Program - Brookhaven National Laboratory

talk the latest results for 95Mo [3] are presented and compared to PSF data measured at the University
of Oslo [4]. In particular, questions regarding the existence of the low-energy enhancement in the photon
strength function will be addressed. This work is supported by the U.S. Department of Energy Lawrence
Livermore National Laboratory under Contract No. DE-AC52-07NA27344, University of Richmond under
DEFG52-06NA26206 and DE-FG02-05ER41379, Lawrence Berkeley National Laboratory under Contract
No. DE-AC02-05CH11231, and by the National Research Foundation of South Africa.
[1] M. Arnould, S. Goriely and K. Takahashi, Physics Reports 450, 97213 (2007). [2] M.B. Chadwick et
al., Data Nuclear Data Sheets 112, 2887 (2011). [3] M. Wiedeking et al., Phys. Rev. Lett. 108, 162503
(2012). [4] M. Guttormsen et al., Phys. Rev. C 71, 044307 (2005).
DF 8 5:45 PM
Recent Results on Studying Photon Strength Functions in Rare-Earth Nuclei
Valenta Stanislav, Bečváˇr Frantiˇsek, Kroll Jiˇrí, Krtička Milan
Charles University in Prague
According to the statistical model of the nucleus the photon strength functions (PSFs) and nuclear level
densities are the only entities that describe average properties of gamma-decay of highly or moderately
excited levels in medium-weight and heavy nuclei. In this contribution recent results on PSFs in rare-earth
nuclei are presented. The available experimental information come from various reactions. Our focus is
on results from different (n,γ) experiments, specificaly resonance capture experiment performed at the
LANSCE/DANCE neutron time-of-flight facility in Los Alamos (e.g. [1]), the average neutron capture
experiment at Karlsruhe Van de Graaff facility (e.g. [2]) and TSC experiments performed at LVR-15
reactor in ˇ Reˇz (e.g. [3]). The emphasis is given to the following questions about dipole PSFs: What is the
favored shape of low energy tail of GDER, i.e. behaviour of E1 PSF? Are there any resonances present in
dipole PSFs around and below neutron separation energy and if so what are their properties? The results
are confronted with those from nuclear resonance fluorescence[4] and 3 He induced gamma emission[5].
[1] Chyzh A., Baramsai B., Becker J. A. et al., PRC 84, 014306 (2011) [2] K. Wisshak et al., PRC 73,
045807 (2006) [3] Kroll J. et al., FRONTIERS IN NUCLEAR STRUCTURE, ASTROPHYSICS, AND
REACTIONS (FINUSTAR 3), AIP Conference Proceedings vol. 1377 p. 371 (2011) [4] U. Agvaanluvsan
et al., Phys. Rev. C70, 054611 (2004) [5] U. Kneissl, H.H. Pitz, A. Zilges, Prog. Part. Nucl. Phys. 37, p.
349 (1996)
Session EA Plenary Tuesday
Tuesday March 5, 2013
Room: Met East at 8:30 AM
EA 1 8:30 AM
WPEC SG33 on: Methods and Issues for the Combined Use of Integral Experiments and
Covariance Data
M. Salvatores, G. Palmiotti, E. Dupont, M. Ishikawa, C. De Saint-Jean, R. D. McKnight, S. Pelloni, (on
behalf of the members of the subgroup*)
CEA, INL, NEA, JAEA, ANL, PSI
The Working Party on International Nuclear Data Evaluation Cooperation (WPEC) of the OECD NEA
Nuclear Science Committee has established a Subgroup (called “Subgroup 33”) on “Methods and issues
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