Parity nonconservation in neutron capture on <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow></mrow><mrow><mn>113</mn></mrow></msup></mrow><mi mathvariant="normal">Cd</mi></math></span>

S. J. Seestrom; J. D. Bowman; B. E. Crawford; P. P. J. Delheij; C. M. Frankle; C. R. Gould; D. G. Haase; M. Iinuma; J. N. Knudson; P. E. Koehler; L. Y. Lowie; A. Masaike; Y. Masuda; Y. Matsuda; G. E. Mitchell; S. I. Penttilä; Yu. P. Popov; H. Postma; N. R. Roberson; E. I. Sharapov; H. M. Shimizu; D. A. Smith; S. L. Stephenson; Y. F. Yen; V. W. Yuan

doi:10.1103/PhysRevC.58.2977

Parity nonconservation in neutron capture on $^{113} Cd$

S. J. Seestrom, J. D. Bowman, B. E. Crawford, P. P. J. Delheij, C. M. Frankle, C. R. Gould, D. G. Haase, M. Iinuma, J. N. Knudson, P. E. Koehler, L. Y. Lowie, A. Masaike, Y. Masuda, Y. Matsuda, G. E. Mitchell, S. I. Penttilä, Yu. P. Popov, H. Postma, N. R. Roberson, E. I. Sharapov, H. M. Shimizu, D. A. Smith, S. L. Stephenson, Y. F. Yen, and V. W. Yuan

Phys. Rev. C 58, 2977 – Published 1 November 1998

Abstract

Parity nonconservation was studied for 23 $p$ -wave resonances in $^{113} Cd$ up to $E_{n} = 500 eV$ at the LANSCE pulsed neutron source using a longitudinally polarized neutron beam and the time-of-flight method. The helicity dependence of the total neutron capture cross section was measured with an enriched $^{113} Cd$ target and with a target of natural cadmium. Parity violating effects were observed for several resonances in $^{113} Cd$ and $^{111} Cd .$ A root-mean-square value of the parity nonconserving matrix element $M_{J = 1} {= 2.9}_{- 0.9}^{+ 1.3} meV$ was obtained for the spin $J = 1$ levels in the compound nucleus $^{114} Cd .$ This result from the $3 p$ -peak region of the neutron strength function is compared with the parity violation results for nuclei from the $4 p$ -peak region.

Received 2 December 1997

DOI:https://doi.org/10.1103/PhysRevC.58.2977

Authors & Affiliations

S. J. Seestrom¹, J. D. Bowman¹, B. E. Crawford^2,3,*, P. P. J. Delheij⁴, C. M. Frankle¹, C. R. Gould^3,5, D. G. Haase^3,5, M. Iinuma^6,†, J. N. Knudson¹, P. E. Koehler^1,‡, L. Y. Lowie^3,5, A. Masaike⁶, Y. Masuda⁷, Y. Matsuda⁶, G. E. Mitchell^3,5, S. I. Penttilä¹, Yu. P. Popov⁸, H. Postma⁹, N. R. Roberson^2,3, E. I. Sharapov⁸, H. M. Shimizu^7,§, D. A. Smith¹, S. L. Stephenson^3,5,∥, Y. F. Yen¹, and V. W. Yuan¹

¹Los Alamos National Laboratory, Los Alamos, New Mexico 87545
²Duke University, Durham, North Carolina 27708
³Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708
⁴TRIUMF, Vancouver, British Columbia, Canada V6T 2A3
⁵North Carolina State University, Raleigh, North Carolina 27965
⁶Physics Department, Kyoto University, Kyoto 606-01, Japan
⁷National Laboratory of High Energy Physics, Tsukuba-shi 305, Japan
⁸Joint Institute for Nuclear Research, Dubna, 141980, Russia
⁹Delft University of Technology, Delft, 2600 GA, the Netherlands

^*Present address: North Carolina State University, Raleigh, NC 27695-8202 and Gettysburg College, Gettysburg, PA 17325.
^†Present address: Hiroshima University, Hiroshima-Ken, 739, Japan.
^‡Present address: Oak Ridge National Laboratory, Oak Ridge, TN 37831.
^§Present address: RIKEN, Saitama 351-01, Japan
^∥Present address: Gettysburg College, Gettysburg, PA 17325.

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Vol. 58, Iss. 5 — November 1998

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