PARITY NONCONSERVATION FOR NEUTRON RESONANCES IN TH-232

被引：67

作者：

FRANKLE, CM

BOWMAN, JD

BUSH, JE

DELHEIJ, PPJ

GOULD, CR

HAASE, DG

KNUDSON, JN

MITCHELL, GE

PENTTILA, S

POSTMA, H

ROBERSON, NR

SEESTROM, SJ

SZYMANSKI, JJ

YOO, SH

YUAN, VW

ZHU, X

机构：

[1] N CAROLINA STATE UNIV, RALEIGH, NC 27695 USA

[2] TRIANGLE UNIV NUCL LAB, DURHAM, NC 27706 USA

[3] TRIUMF, VANCOUVER V6T 2A3, BC, CANADA

[4] DELFT UNIV TECHNOL, 2600 GA DELFT, NETHERLANDS

[5] DUKE UNIV, DURHAM, NC 27706 USA

来源：

PHYSICAL REVIEW C | 1992年 / 46卷 / 02期

关键词：

D O I：

10.1103/PhysRevC.46.778

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Parity nonconserving (PNC) longitudinal analyzing powers were measured for 23 p-wave neutron resonances in Th-232. Seven resonances show effects of greater than 2.4-sigma statistical significance-the largest sample yet measured in a single nucleus. All seven analyzing powers have positive sign. Strong sign correlations are not a feature of the conventional statistical model of parity mixing between compound nuclear states. The asymmetry was expressed as a sum of two terms: a constant asymmetry and a fluctuating asymmetry. With this ansatz the root-mean-square PNC matrix element M = 1.2(-0.4)+0.5 meV, which corresponds to a spreading width of GAMMA(PV) = 6 x 10(-7) eV.

引用

页码：778 / 787

页数：10

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