DECAY PROPERTIES AND LIFETIMES OF STATES IN SM-144 FROM (N, N'GAMMA) REACTION STUDIES

被引：26

作者：

GATENBY, RA

JOHNSON, EL

BAUM, EM

YATES, SW

WANG, D

VANHOY, JR

MCELLISTREM, MT

BELGYA, T

FAZEKAS, B

MOLNAR, G

机构：

[1] HUNGARIAN ACAD SCI,INST ISOTOPES,POB 77,H-1525 BUDAPEST,HUNGARY

[2] UNIV KENTUCKY,DEPT CHEM,LEXINGTON,KY 40506

[3] UNIV KENTUCKY,DEPT PHYS,LEXINGTON,KY 40506

来源：

NUCLEAR PHYSICS A | 1993年 / 560卷 / 02期

关键词：

144SM; (N; N'GAMMA); E(N) = 1.8-4.3 MEV; MEASURED E-GAMMA; I-GAMMA; I(GAMMA)(THETA); E-GAMMA(THETA); SIGMA(E-GAMMA); DOPPLER SHIFT; 144SM-DEDUCED LEVELS; J; PI; BRANCHING RATIOS; DELTA; T(1/2); B(LAMBDA); ENRICHED TARGET; HYPERPURE GE DETECTOR; COMPTON SUPPRESSION; 2-PHONON STATES; SHELL MODEL;

D O I：

10.1016/0375-9474(93)90038-Y

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：

An extensive investigation of Sm-144 has been carried out with the (n, n'gamma) reaction. Gamma-ray excitation function and angular-distribution measurements were performed at neutron energies up to 4.3 MeV. Many new levels have been established and characterized, and the assignments of several previously known states have been clarified. Level lifetimes were measured following the inelastic neutron-scattering reaction by observing the Doppler shifts of de-exciting gamma-rays, and reduced transition rates have been inferred. Recent shell-model calculations were found to describe the Sm-144 level scheme very well up to 3.2 MeV. A large number of relatively fast E1 transitions were observed.

引用

页码：633 / 663

页数：31

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