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ID 19328
本文ファイル
著者
Stephenson, S. L.
Bowman, J. D.
Crawford, B. E.
Delheij, P. P. J.
Frankle, C. M.
Knudson, J. N.
Lowie, L. Y.
Masaike, Akira
Matsuda, Yasuyuki
Mitchell, G. E.
Penttilä, S. I.
Postma, H.
Roberson, N. R.
Seestrom, S. J.
Sharapov, E. I.
Yen, Y.-F.
Yuan, V.W.
抄録(英)
Parity nonconservation (PNC) was measured for 24 p-wave resonances from 8 to 300 eV in 232Th by measuring the helicity dependence of the total neutron cross section for epithermal neutrons with an improved experimental system. Ten resonances show statistically significant parity violation. For these ten resonances the analyzing powers are all positive, thus confirming the previously observed sign correlation. The data are fit to the sum of two terms, a constant asymmetry and a fluctuating asymmetry. With this ansatz the root-mean-square PNC matrix element M = 1.12 meV, which corresponds to a weak spreading width Γw = 4.7× 10-7 eV. For the neighboring nuclide 238U there is no constant offset, suggesting that the sign correlation is specific to 232Th.
掲載誌名
Physical Review C - Nuclear Physics
58巻
2号
開始ページ
1236
終了ページ
1246
出版年月日
1998-10
出版者
American Physical Society
ISSN
0556-2813
NCID
出版者DOI
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
publisher
権利情報
Copyright (c) 1998 The American Physical Society.
関連情報URL
部局名
先端物質科学研究科