Is the generalized Brink-Axel hypothesis valid?

M. Guttormsen; A. C. Larsen; A. Görgen; T. Renstrøm; S. Siem; T. G. Tornyi; G. M. Tveten

Is the generalized Brink-Axel hypothesis valid?

M. Guttormsen, A. C. Larsen, A. Görgen, T. Renstrøm, S. Siem, T. G. Tornyi, G. M. Tveten

Research output: Contribution to journal › Conference article › peer-review

1 Citation (Scopus)

Abstract

Experimental results of the ²³⁷Np(d, pγ)²³⁸Np reaction are presented, which verifies the generalized Brink-Axel (gBA) hypothesis for γ transitions between states in the quasi-continuum. The gBA hypothesis holds not only for specific collective resonances, but for the full dipole strength below the neutron separation energy. We discuss the validity of the gBA hypothesis also for lighter systems like ⁹²Zr where the concept of a unique γ-ray strength function (γSF) is problematic due to large Porter-Thomas fluctuations. Methods for studying the γSF and the fluctuations as function of excitation energy are presented.

Original language	English
Article number	062
Journal	Proceedings of Science
Volume	2016-September
Publication status	Published - 2016
Event	26th International Nuclear Physics Conference, INPC 2016 - Adelaide, Australia Duration: 11 Sept 2016 → 16 Sept 2016

Cite this

@article{6bf63f1b8e14454e928890cdc5e7db3a,

title = "Is the generalized Brink-Axel hypothesis valid?",

abstract = "Experimental results of the 237Np(d, pγ)238Np reaction are presented, which verifies the generalized Brink-Axel (gBA) hypothesis for γ transitions between states in the quasi-continuum. The gBA hypothesis holds not only for specific collective resonances, but for the full dipole strength below the neutron separation energy. We discuss the validity of the gBA hypothesis also for lighter systems like 92Zr where the concept of a unique γ-ray strength function (γSF) is problematic due to large Porter-Thomas fluctuations. Methods for studying the γSF and the fluctuations as function of excitation energy are presented.",

author = "M. Guttormsen and Larsen, {A. C.} and A. G{\"o}rgen and T. Renstr{\o}m and S. Siem and Tornyi, {T. G.} and Tveten, {G. M.}",

note = "Publisher Copyright: {\textcopyright} Copyright owned by the author(s).; 26th International Nuclear Physics Conference, INPC 2016 ; Conference date: 11-09-2016 Through 16-09-2016",

year = "2016",

language = "English",

volume = "2016-September",

journal = "Proceedings of Science",