Two-step gamma cascades following thermal neutron capture in Mo-95

0312883 - ÚJF 2009 RIV US eng J - Journal Article
Krtička, M. - Bečvář, F. - Tomandl, Ivo - Rusev, G. - Agvaanluvsan, U. - Mitchell, G. E.
Two-step gamma cascades following thermal neutron capture in Mo-95.
[Dvoustupňové gama kaskády následující záchyt termálního neutronu na Mo-95.]
Physical Review. C. Roč. 77, č. 5 (2008), 054319/1-054319/15. ISSN 0556-2813
Institutional research plan: CEZ:AV0Z10480505
Keywords : photon strength funtions * gamma-cascades * level density
Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders
Impact factor: 3.124, year: 2008

A strong enhancement of the photon strength function at low gamma-ray energies was recently reported for several Mo isotopes. To study this enhancement further we have measured the spectra of two-step gamma cascades following thermal neutron capture in Mo-95. These spectra were compared with simulations of the gamma decay of (MO)-M-96 performed with the aid of the DICEBOX algorithm. Simulations with a large number of model combinations of photon strength functions for E1, M1, and E2 radiation are not consistent with the strong enhancement observed in the Mo-96(He-3,He-3'gamma)Mo-96 and Mo-97(He-3, alpha gamma)Mo-96 reactions. Predictions based on a combination of E1, M1, and E2 photon strength functions with no enhancement of the photon strength functions at low gamma-ray energies are in good agreement with the two-step gamma cascade data.

Byly měřeny dvoustupňové gama kaskády následující záchyt termálního neutronu na Mo-95. Spektra byla srovnána s několika teoretickými modely a nalezen souhlas s predikcí založenou na kombinaci E1,E2 a M1 fotonových silových funkcí bez zesílení pro malé energie gama.
Permanent Link: http://hdl.handle.net/11104/0163837