JPH05100041A - Solid track detector - Google Patents
Solid track detectorInfo
- Publication number
- JPH05100041A JPH05100041A JP28190091A JP28190091A JPH05100041A JP H05100041 A JPH05100041 A JP H05100041A JP 28190091 A JP28190091 A JP 28190091A JP 28190091 A JP28190091 A JP 28190091A JP H05100041 A JPH05100041 A JP H05100041A
- Authority
- JP
- Japan
- Prior art keywords
- sensitivity
- monomer
- average value
- diethylene glycol
- formula
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000007787 solid Substances 0.000 title claims description 9
- 239000000178 monomer Substances 0.000 claims abstract description 23
- 229920000642 polymer Polymers 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 claims description 3
- 125000001183 hydrocarbyl group Chemical group 0.000 claims description 2
- 230000000379 polymerizing effect Effects 0.000 claims 1
- 230000035945 sensitivity Effects 0.000 abstract description 22
- SYFOAKAXGNMQAX-UHFFFAOYSA-N bis(prop-2-enyl) carbonate;2-(2-hydroxyethoxy)ethanol Chemical compound OCCOCCO.C=CCOC(=O)OCC=C SYFOAKAXGNMQAX-UHFFFAOYSA-N 0.000 abstract description 13
- PYGSKMBEVAICCR-UHFFFAOYSA-N hexa-1,5-diene Chemical group C=CCCC=C PYGSKMBEVAICCR-UHFFFAOYSA-N 0.000 abstract description 6
- 239000002131 composite material Substances 0.000 abstract 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Natural products C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract 1
- 239000000126 substance Substances 0.000 description 12
- 239000002245 particle Substances 0.000 description 8
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 6
- 238000005530 etching Methods 0.000 description 5
- 230000004992 fission Effects 0.000 description 5
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 4
- 239000012634 fragment Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000006116 polymerization reaction Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000005260 alpha ray Effects 0.000 description 3
- JJWKPURADFRFRB-UHFFFAOYSA-N carbonyl sulfide Chemical compound O=C=S JJWKPURADFRFRB-UHFFFAOYSA-N 0.000 description 3
- 238000003486 chemical etching Methods 0.000 description 3
- 238000001000 micrograph Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- WQDUMFSSJAZKTM-UHFFFAOYSA-N Sodium methoxide Chemical compound [Na+].[O-]C WQDUMFSSJAZKTM-UHFFFAOYSA-N 0.000 description 2
- XXROGKLTLUQVRX-UHFFFAOYSA-N allyl alcohol Chemical compound OCC=C XXROGKLTLUQVRX-UHFFFAOYSA-N 0.000 description 2
- -1 allyl diethylene glycol carbonate Chemical compound 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 125000005587 carbonate group Chemical group 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000003505 polymerization initiator Substances 0.000 description 2
- 238000000425 proton nuclear magnetic resonance spectrum Methods 0.000 description 2
- 238000010526 radical polymerization reaction Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 2
- BEQKKZICTDFVMG-UHFFFAOYSA-N 1,2,3,4,6-pentaoxepane-5,7-dione Chemical compound O=C1OOOOC(=O)O1 BEQKKZICTDFVMG-UHFFFAOYSA-N 0.000 description 1
- LZDKZFUFMNSQCJ-UHFFFAOYSA-N 1,2-diethoxyethane Chemical compound CCOCCOCC LZDKZFUFMNSQCJ-UHFFFAOYSA-N 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 229910052770 Uranium Inorganic materials 0.000 description 1
- 229910052790 beryllium Inorganic materials 0.000 description 1
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- JKJWYKGYGWOAHT-UHFFFAOYSA-N bis(prop-2-enyl) carbonate Chemical compound C=CCOC(=O)OCC=C JKJWYKGYGWOAHT-UHFFFAOYSA-N 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 150000001451 organic peroxides Chemical class 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- BWJUFXUULUEGMA-UHFFFAOYSA-N propan-2-yl propan-2-yloxycarbonyloxy carbonate Chemical compound CC(C)OC(=O)OOC(=O)OC(C)C BWJUFXUULUEGMA-UHFFFAOYSA-N 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 229910052704 radon Inorganic materials 0.000 description 1
- SYUHGPGVQRZVTB-UHFFFAOYSA-N radon atom Chemical compound [Rn] SYUHGPGVQRZVTB-UHFFFAOYSA-N 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Measurement Of Radiation (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
Description
【０００１】本発明は、宇宙線の観測や素粒子の研究、
ウラン、ラドン濃度の定量、中性子線量計等に使用され
る固体飛跡検出器に関するものである。The present invention relates to the observation of cosmic rays and the study of elementary particles,
The present invention relates to solid state track detectors used for quantification of uranium and radon concentrations and neutron dosimeters.
【０００２】[0002]
【従来の技術】荷電粒子の飛跡を検出するのに種々の絶
縁性固体を用いる方法がある。これは、荷電粒子が固体
中を通過する際に与える損傷を化学エッチングで拡大
し、生成した円錐状のピットを観察するもので、古くか
らフィッショントラック法という呼び名で考古学分野で
広く用いられている。そして、近年では、この測定法を
考古学分野だけでなく、放射線測定、個人被爆量計にも
利用すべく検出感度が調べられた結果、無機材料よりも
有機系プラスチックのほうが感度が高く、さらに１９７
８年にはカートライトらによって、ジエチレングリコー
ルビスアリルカーボネートの重合体がそれ迄の各種材料
と比較して著しく高い感度を有することが発見された。
このジエチレングリコールビスアリルカーボネートは、
眼鏡レンズ用に開発された樹脂で、特に固体飛跡検出器
用に設計されたものではないが、現在では最高の感度を
もつ固体飛跡検出器として、宇宙線の観測や中性子線量
計などに広く用いられている。2. Description of the Related Art There are various methods of using an insulating solid to detect a track of charged particles. This is to observe the conical pits generated by enlarging damage caused by charged particles when they pass through a solid by chemical etching, and has been widely used in archeology for a long time under the name of fission track method. There is. In recent years, as a result of examining the detection sensitivity so that this measurement method can be used not only in the archeological field but also in radiation measurement and personal exposure meter, the sensitivity of organic plastics is higher than that of inorganic materials. 197
In 8 years, it was discovered by Cartwright et al. That a polymer of diethylene glycol bisallyl carbonate has a remarkably high sensitivity as compared with various conventional materials.
This diethylene glycol bisallyl carbonate is
It is a resin developed for eyeglass lenses, and is not designed especially for solid-state track detectors, but is now widely used as a solid-state track detector with the highest sensitivity for cosmic ray observation and neutron dosimeters. ing.
【０００３】[0003]
【発明が解決しようとする問題点】しかしこの素材にも
限界があり、エネルギーが高く電荷の小さい粒子の検出
は困難である。例えば、高エネルギーのリチウム、ベリ
リウム、ホウ素などはこの素材では、検出できない。も
しこれらの荷電粒子を検出できる素材が得られれば、宇
宙線の起源や銀河中での伝播に関する新しい情報が得ら
れる可能性もある。また、このような高感度の固体飛跡
検出器は、放射線計測の分野における応用範囲をさらに
大きく発展させるものと考えられる。However, this material is also limited, and it is difficult to detect particles with high energy and small charge. For example, high energy lithium, beryllium, boron, etc. cannot be detected with this material. If materials that can detect these charged particles are available, new information on the origin of cosmic rays and their propagation in the galaxy may be obtained. Further, such a high-sensitivity solid-state track detector is considered to further expand the range of application in the field of radiation measurement.
【０００４】従って本発明の目的は、現在使用されてい
るジエチレングリコールビスアリルカーボネート重合体
に比較してさらに高い感度をもつ固体飛跡検出器を創出
することにある。It is therefore an object of the present invention to create a solid state track detector having a much higher sensitivity than the currently used diethylene glycol bisallyl carbonate polymers.
【問題点を解決するための手段】ジエチレングリコール
ビスアリルカーボネートが、荷電粒子に対し比較的高い
感度を有することは、ジエチレングリコールビスアリル
カーボネート分子構造中に荷電粒子に対して損傷を受け
やすい部分を有しているものと考えられる。[Means for Solving Problems] The fact that diethylene glycol bisallyl carbonate has a relatively high sensitivity to charged particles means that the diethylene glycol bisallyl carbonate has a portion in the molecular structure which is easily damaged by charged particles. It is thought that it is.
【０００５】そこで本発明者等は、その分子構造の一部
を変更し、いくつかの新しい樹脂を合成して、感度と分
子構造の関係を系統的に検討し、その結果、ジエチレン
グリコールビスアリルカーボネート中のアリル基とカー
ボネート基の比率の変更によりすぐれた感度を有する重
合体が得られることを見いだした。Therefore, the present inventors modified a part of the molecular structure, synthesized some new resins, and systematically investigated the relationship between sensitivity and molecular structure. As a result, diethylene glycol bisallyl carbonate was obtained. It was found that a polymer having excellent sensitivity can be obtained by changing the ratio of the allyl group to the carbonate group in the polymer.
【０００６】本発明の主成分となるジアリルモノマー
は、次の一般式 「化１」 で表わされる（ｍは０以上５以下であり、ｎの平均値は
１より大）。The diallyl monomer which is the main component of the present invention has the following general formula (M is 0 or more and 5 or less, and the average value of n is greater than 1).
【０００７】ここで、Ｒ1 、Ｒ2 は、２価の炭化水素
基であって、同一でも、異なっていてもよい。その具体
例としては、Here, R 1 and R 2 are divalent hydrocarbon groups, which may be the same or different. As a concrete example,
【化２】―（ＣＨ2 ）ｒ ― （ｒ ＝１〜４）Embedded image — (CH 2 ) r— (r = 1 to 4)
【０００８】[0008]
【化３】 [Chemical 3]
【０００９】[0009]
【化４】 [Chemical 4]
【００１０】[0010]
【化５】 などがあり、これらのうちでとくに好適な例としては、[Chemical 5] Among these, as a particularly preferable example of these,
【００１１】[0011]
【化６】 [Chemical 6]
【００１２】[0012]
【化７】 があげられる（ただし、ｎの平均値はいずれも１より
大）。[Chemical 7] (However, the average value of n is larger than 1 in all cases).
【００１３】本発明において用いる前記「化１」のジア
リルモノマーを単独で用いる場合は、ｎの平均値が１よ
り大であり、特に１＜ｎ＜４であることが望ましい。When the diallyl monomer of "Chemical Formula 1" used in the present invention is used alone, the average value of n is preferably larger than 1, and particularly preferably 1 <n <4.
【００１４】また、本発明においては、前記「化１」で
表されるジアリルモノマーの複数種を混合した状態で使
用することも可能であり、この場合においては全部のモ
ノマーについてのｎの平均値が１より大であり、特に１
＜ｎ＜４であることが望ましい。In the present invention, it is also possible to use a mixture of a plurality of diallyl monomers represented by the above "Chemical formula 1", and in this case, the average value of n for all the monomers is used. Is greater than 1, especially 1
It is desirable that <n <4.
【００１５】更にジエチレングリコールビスアリルカー
ボネートなどの併用により感度を任意にコントロールす
ることや、ガラス転移点の低下を補うために次式Further, in order to control the sensitivity arbitrarily by using a combination of diethylene glycol bisallyl carbonate and the like, in order to compensate the lowering of the glass transition point, the following formula
【化８】 [Chemical 8]
【００１６】[0016]
【化９】 で表されるモノマーを併用することも可能である。[Chemical 9] It is also possible to use the monomer represented by
【００１７】本発明により得られた感度の増加の理由に
ついて本発明者は以下のように推測する。すなわち、ア
リルカーボネート重合体に荷電粒子が入射した際、もっ
とも損傷を受けやすいのがカーボネート結合である。一
方、アリル基は、重合の際ビニル鎖を形成し安定な構造
をとる。本発明に使用されるモノマーは、重合して、ジ
エチレングリコールビスアリルカーボネート重合体と類
似の形態をとるがアリル基に対しカーボネート基のモル
比が増加するため、単位容積内の損傷の程度も増加す
る。The present inventors presume the reason for the increase in sensitivity obtained by the present invention as follows. That is, the carbonate bond is most easily damaged when charged particles are incident on the allyl carbonate polymer. On the other hand, the allyl group forms a vinyl chain during polymerization and has a stable structure. The monomer used in the present invention is polymerized to take a form similar to that of the diethylene glycol bisallyl carbonate polymer, but the molar ratio of the carbonate group to the allyl group is increased, so that the degree of damage in the unit volume is also increased. ..
【００１８】カーボネート結合がより多く破壊される
と、ビニル鎖は、化学エッチングの際に容易に母体から
切り離され、円錐状のピットをより明確に形成するもの
と考えられる。It is believed that the more carbonate bonds are broken, the vinyl chains are more easily detached from the matrix during chemical etching, forming more conical pits.
【００１９】本発明の個体飛跡検出器の成型は、公知の
ラジカル重合法により行なうことができる。固体飛跡検
出器として一般に使用される板状重合体は、ガラス板な
どの２枚の平板をスペーサーを介してセルを作成し、そ
の内部に重合開始剤を加えたモノマー混合物を注入し、
加熱重合を行なう。重合開始剤としては特に制限はな
く、ラジカル重合に用いられる有機過酸化物が使用でき
るが、アリル基の重合をスムーズに行なうために、ペル
オキシジカーボネート系過酸化物が好適に使用される。The solid track detector of the present invention can be molded by a known radical polymerization method. The plate-like polymer generally used as a solid track detector is made by forming a cell with two flat plates such as glass plates through a spacer and injecting a monomer mixture containing a polymerization initiator into the cell.
Heat polymerization is performed. The polymerization initiator is not particularly limited, and an organic peroxide used for radical polymerization can be used, but a peroxydicarbonate-based peroxide is preferably used in order to smoothly carry out the polymerization of the allyl group.
【００２０】本発明の固体飛跡検出器の感度の評価は次
のように行なった。肉厚１ｍｍの板状重合体を試料とし
Ｃｆ252からのエネルギー６ＭｅＶのアルファ線とフィ
ッションフラグメントを垂直に照射した。照射後、熱ア
ルカリ水溶液でエッチング処理を行ない形成されたエッ
チピットを顕微鏡下で観察した。アルファ線とフィッシ
ョンフラグメントによって形成されたエッチピットの直
径をそれぞれＤａ及びＤｆとすると、感度Ｓは次式で表
される。The sensitivity of the solid state track detector of the present invention was evaluated as follows. A plate polymer having a wall thickness of 1 mm was used as a sample, and an alpha ray with an energy of 6 MeV from Cf 252 and a fission fragment were vertically irradiated. After the irradiation, etching treatment was performed with a hot alkaline aqueous solution, and the formed etch pits were observed under a microscope. When the diameters of the etch pits formed by the alpha rays and fission fragments are Da and Df, respectively, the sensitivity S is expressed by the following equation.
【００２１】[0021]
【数１】 [Equation 1]
【００２２】[0022]
実施例１ モノマーの製造方法 攪拌装置、留出装置および内部温度調節装置を有する３
００ｍｌフラスコに、アリルジエチレングリコールカー
ボネート２１９．４ｇ（０．８０モル）、ジエチレング
リコールを２１．２ｇ（０．２０モル）を張り込み混合
した後加温を開始した。内部温度が１４０℃に到達した
時点で触媒として、ナトリウムメチラートを４８０ｐｐ
ｍ添加した後、温度を１４０℃に維持し反応を開始し
た。７時間反応を行なった後、残留しているアリルアル
コールを除くため２時間減圧処理を行った。Example 1 Method for Producing Monomer 3 Having Stirrer, Distiller and Internal Temperature Controller
Into a 00 ml flask, 219.4 g (0.80 mol) of allyl diethylene glycol carbonate and 21.2 g (0.20 mol) of diethylene glycol were added and mixed, and then heating was started. When the internal temperature reached 140 ° C, 480 pp of sodium methylate was used as a catalyst.
After the addition of m, the temperature was maintained at 140 ° C. to start the reaction. After reacting for 7 hours, a reduced pressure treatment was carried out for 2 hours to remove residual allyl alcohol.
【００２３】プロトンＮＭＲ分析により平均分子量３６
０であるモノマーが生成していることが分った。また、
このモノマーをＧＰＣにより測定した結果、「化６」に
おけるｎ＝１、ｎ＝２を主成分とするもので、ｎの平均
値は１．６であった。Average molecular weight of 36 by proton NMR analysis
It was found that 0 monomer was produced. Also,
As a result of measuring this monomer by GPC, n = 1 and n = 2 in "Chemical Formula 6" were the main components, and the average value of n was 1.6.
【００２４】成型板の製法 上記により合成したモノマーに開始剤としてジイソプロ
ピルパーオキシジカーボネート５ｗｔ％を添加し、１ｍ
ｍのクリアランスを有するセルに注入し、４０から１０
０℃まで２４時間かけ昇温し、重合を行った。また比較
のため炭酸ソーダ法により合成された純度９９．９％の
ジエチレングリコールビスアリルカーボネートモノマー
も同一の条件で重合を行った（ｎ＝１）。得られた２種
類の板にＣｆ252からのフィッションフラグメントと１
〜６ＭｅＶのアルファ線を照射した。Manufacturing Method of Molded Plate To the monomer synthesized above, 5 wt% of diisopropyl peroxydicarbonate was added as an initiator, and 1 m
injected into a cell with a clearance of m
Polymerization was carried out by raising the temperature to 0 ° C over 24 hours. For comparison, diethylene glycol bisallyl carbonate monomer having a purity of 99.9% synthesized by the sodium carbonate method was also polymerized under the same conditions (n = 1). The fission fragment from Cf 252 and 1
Irradiated with ~ 6 MeV alpha radiation.
【００２５】照射後、７０℃、６．２５規定のＮａＯＨ
水溶液にて化学エッチングを行ない、エッチピットを顕
微鏡にて観測し、「数１」により感度を求めた。その結
果、比較のため作成したジエチレングリコールビスアリ
ルカーボネートの感度がＳ＝１．２であるのに対し、本
実施例ではＳ＝３．３と約３倍高感度であった。またＣ
ｆ252のフィッションフラグメントと６ＭｅＶのアルフ
ァ線を照射した試料について、本実施例と比較例におけ
るエッチピットの顕微鏡写真を撮ったところ、６ＭｅＶ
のアルファ線によるエッチピットがより深く生成してお
り明らかに感度が増加していることがわかる。この顕微
鏡写真の模式図を図１及び図２に示す。After irradiation, 70 ° C., 6.25N NaOH
The chemical etching was performed in an aqueous solution, the etch pits were observed with a microscope, and the sensitivity was calculated by "Equation 1". As a result, the sensitivity of the diethylene glycol bisallyl carbonate prepared for comparison was S = 1.2, while in this example, it was S = 3.3, which was about three times higher. Also C
Photomicrographs of the etch pits in this example and the comparative example were taken for the sample irradiated with the fission fragment of f 252 and the alpha ray of 6 MeV.
It can be seen that the etch pits due to the alpha ray of are formed deeper and the sensitivity is obviously increased. A schematic view of this micrograph is shown in FIGS. 1 and 2.
【００２６】実施例２ アリルジエチレングリコールカーボネート１９７．５ｇ
（０．７２モル）、ジエチレングリコール２９．７ｇ
（０．２８モル）を使用した以外は実施例１と同様な方
法で合成した。プロトンＮＭＲ分析に平均分子量４３９
であるモノマーであった。またＧＰＣより「化６」のｎ
＝１，２，３を主成分とするものであり、ｎの平均値は
２であった。Example 2 Allyldiethylene glycol carbonate 197.5 g
(0.72 mol), diethylene glycol 29.7 g
Synthesis was carried out in the same manner as in Example 1 except that (0.28 mol) was used. Average molecular weight of 439 for proton NMR analysis
Was a monomer. Also, from GPC, n
= 1, 2, 3 was the main component, and the average value of n was 2.
【００２７】このモノマーと実施例１で使用した純度９
９．９％ジエチレグリコールビスアリルカーボネートと
を比率を変えて混合し、実施例１と同様にして成型板を
作成し、感度を調べた。エッチピット部分のエッチング
速度をＶｔ（μ／ｈ）、エッチピットのない表面層のエ
ッチング速度をＶｂ（μ／ｈ）として、ｎの平均値との
関係を図３に示す。その結果、ｎ＝１．６付近で感度Ｓ
＝Ｖｔ／Ｖｂ−１の最大があり、この混合比でジエチレ
ングリコールビスアリルカーボネート単独のものに対し
て約２倍感度が高かった。またこの図３においてＶｔ／
Ｖｂ＝１のときはエッチピットは生成せず、Ｖｔ／Ｖｂ
＞１のときに生成し、Ｖｔ／Ｖｂ−１の値が大きいほ
ど、エッチピットはより深く生成することになり、感度
も高いといえる。This monomer and the purity of 9 used in Example 1
9.9% diethyl glycol bisallyl carbonate was mixed at different ratios, a molded plate was prepared in the same manner as in Example 1, and the sensitivity was examined. FIG. 3 shows the relationship with the average value of n, where Vt (μ / h) is the etching rate of the etch pit portion and Vb (μ / h) is the etching rate of the surface layer having no etch pit. As a result, the sensitivity S near n = 1.6
= Vt / Vb−1, which was about twice as sensitive as that of diethylene glycol bisallyl carbonate alone at this mixing ratio. Further, in FIG. 3, Vt /
When Vb = 1, no etch pit is generated and Vt / Vb
It can be said that the etch pits are formed deeper as the value of Vt / Vb-1 is larger, and the sensitivity is higher.
【００２８】[0028]
【発明の効果】本発明によれば、「化１」に示すオリゴ
マーを主成分として、「化１」のｎの平均値が１より大
であるモノマーを重合することにより、ジアリルカーボ
ネート系モノマーから成る従来の固体飛跡検出器に比し
て著しく感度の高い検出器を得ることができた。According to the present invention, the oligomer shown in "Chemical formula 1" is used as a main component, and a monomer in which the average value of n in "Chemical formula 1" is greater than 1 is polymerized to obtain a diaryl carbonate monomer. It was possible to obtain a detector with significantly higher sensitivity than the conventional solid-state track detector.
【図１】本発明のエッチピットの顕微鏡写真の模式図を
示す。FIG. 1 shows a schematic diagram of a micrograph of an etch pit of the present invention.
【図２】比較例のエッチピットの顕微鏡写真の模式図を
示す。FIG. 2 shows a schematic diagram of a micrograph of an etch pit of a comparative example.
【図３】エッチピット部分のエッチング速度Ｖｔ、エッ
チピットのない表面層のエッチング速度Ｖｂ、感度Ｓ
と、ｎとの関係を示す。FIG. 3 is an etching rate Vt of an etch pit portion, an etching rate Vb of a surface layer having no etch pit, and a sensitivity S.
And n are shown.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 藤井 正美 東京都町田市東玉川学園２−17−７ ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masami Fujii 2-17-7 Higashitamagawa Gakuen, Machida, Tokyo
Claims (1)
は０以上５以下であり、ｎの平均値は１より大である で表されるオリゴマーを主成分とするモノマー組成物を
重合してなる重合体から成る固体飛跡検出器。1. A general formula: In the formula, R 1 and R 2 represent a divalent hydrocarbon group, m
Is 0 or more and 5 or less, and the average value of n is greater than 1. A solid track detector made of a polymer obtained by polymerizing a monomer composition having an oligomer as a main component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28190091A JPH0627860B2 (en) | 1991-10-03 | 1991-10-03 | Solid track detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28190091A JPH0627860B2 (en) | 1991-10-03 | 1991-10-03 | Solid track detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05100041A true JPH05100041A (en) | 1993-04-23 |
| JPH0627860B2 JPH0627860B2 (en) | 1994-04-13 |
Family
ID=17645527
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28190091A Expired - Lifetime JPH0627860B2 (en) | 1991-10-03 | 1991-10-03 | Solid track detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0627860B2 (en) |
-
1991
- 1991-10-03 JP JP28190091A patent/JPH0627860B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0627860B2 (en) | 1994-04-13 |
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