Direct determination of ground-state transition widths of low-lying dipole states in 140Ce with the self-absorption technique

被引：24

作者：

Romig, C. ^{[1
]}

Savran, D. ^{[2
,3
,4
]}

Beller, J. ^{[1
]}

Birkhan, J. ^{[1
]}

Endres, A. ^{[5
]}

Fritzsche, M. ^{[1
]}

Glorius, J. ^{[5
,6
]}

Isaak, J. ^{[2
,3
]}

Pietralla, N. ^{[1
]}

Scheck, M. ^{[1
,7
,8
]}

Schnorrenberger, L. ^{[1
]}

Sonnabend, K. ^{[5
]}

Zweidinger, M. ^{[1
]}

机构：

[1] Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany

[2] GSI Helmholtzzentrum Schwerionenforsch GmbH, ExtreMe Matter Inst, D-64291 Darmstadt, Germany

[3] GSI Helmholtzzentrum Schwerionenforsch GmbH, Div Res, D-64291 Darmstadt, Germany

[4] FIAS, D-60438 Frankfurt, Germany

[5] Goethe Univ Frankfurt, Inst Angew Phys, D-60438 Frankfurt, Germany

[6] EGSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany

[7] Univ West Scotland, Sch Engn, Paisley PA1 2BE, Renfrew, Scotland

[8] Scottish Univ Phys Alliance, SUPA, Glasgow G12 8QQ, Lanark, Scotland

来源：

PHYSICS LETTERS B | 2015年 / 744卷

关键词：

Self absorption; Nuclear resonance fluorescence; Gamma spectroscopy; Ground-state transition width; Pygmy dipole resonance; NEUTRON RADII; NUCLEI; RESONANCE; STRENGTH;

D O I：

10.1016/j.physletb.2015.04.013

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The technique of self absorption has been applied for the first time to study the decay pattern of low-lying dipole states of Ce-140. In particular, ground-state transition widths Gamma(0) and branching ratios Gamma(0)/Gamma to the ground state have been investigated in the energy domain of the pygmy dipole resonance. Relative self-absorption measurements allow for a model-independent determination of Gamma(0). Without the need to perform a full spectroscopy of all decay channels, also the branching ratio to the ground state can be determined. The experiment on Ce-140 was conducted at the bremsstrahlung facility of the superconducting Darmstadt electron linear accelerator S-DALINAC. In total, the self-absorption and, thus, Gamma(0) were determined for 104 excited states of Ce-140. The obtained results are presented and discussed with respect to simulations of gamma cascades using the DICEBOX code. (C) 2015 The Authors. Published by Elsevier B.V.

引用

页码：369 / 374

页数：6

共 2 条

[1] Direct Determination of Ground-State Transition Widths and Natural Level Widths with the Method of Relative Self Absorption
Romig, C.
Beck, T.
Beller, J.
Birkhan, J.
Endres, A.
Fritzsche, M.
Gayer, U.
Glorius, J.
Isaak, J.
Mertes, L.
Pai, H.
Pietralla, N.
Ries, P.
Savran, D.
Scheck, M.
Schnorrenberger, L.
Sonnabend, K.
Werner, V.
Zweidinger, M.
CGS15 - CAPTURE GAMMA-RAY SPECTROSCOPY AND RELATED TOPICS, 2015, 93
[2] Mean-field analysis of ground-state and low-lying electric dipole strength in 22C
Inakura, T.
Horiuchi, W.
Suzuki, Y.
Nakatsukasa, T.
PHYSICAL REVIEW C, 2014, 89 (06):

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