LIFETIMES OF 2-PHONON 1(-) STATES IN EVEN N=82 NUCLEI

被引：58

作者：

HERZBERG, RD ^{[1
]}

BAUSKE, I ^{[1
]}

VONBRENTANO, P ^{[1
]}

ECKERT, T ^{[1
]}

FISCHER, R ^{[1
]}

GEIGER, W ^{[1
]}

KNEISSL, U ^{[1
]}

MARGRAF, J ^{[1
]}

MASER, H ^{[1
]}

PIETRALLA, N ^{[1
]}

PITZ, HH ^{[1
]}

ZILGES, A ^{[1
]}

机构：

[1] UNIV STUTTGART, INST STRAHLENPHYS, D-70569 STUTTGART, GERMANY

来源：

NUCLEAR PHYSICS A | 1995年 / 592卷 / 02期

关键词：

BA-138(GAMMA-GAMMA'); CE-140(GAMMA-GAMMA'); E=4.1 MEV BREMSSTRAHLUNG; MEASURED E(GAMMA); I-GAMMA; BA-138; CE-140 DEDUCED LEVELS; J; DECAY WIDTH; BRANCHING RATIOS; GAMMA(0); B(LAMBDA); T-1/2; NUCLEAR RESONANCE FLUORESCENCE TECHNIQUE; 2-PHONON; 2(+)CIRCLE-TIMES-3(-) STATES IN N=82 NUCLEI REVIEWED;

D O I：

10.1016/0375-9474(95)00303-I

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：

Photon scattering experiments on the semi magic nuclei Ba-138 and Ce-140 have been performed at the bremsstrahlung facility of the Stuttgart Dynamitron. Two-phonon 1(-) states were excited at 4.026 and 3.643 MeV excitation energy respectively as well as a number of 2(+) states between 2 and 4 MeV. Lifetimes and upper limits for the decay to other low-lying states were extracted from the data and are compared to lifetimes given in the literature. The systematics of B(E1) values and energies of the 1(-) two-phonon states is analysed using additional data from previously published (gamma,gamma') experiments on the neighbouring isotones Nd-142 and Sm-144.

引用

页码：211 / 220

页数：10

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