Low Spin States in ¹⁸¹Hf from the Thermal Neutron Capture Reaction

Abstract

Low spin states in Ie1Hf f r o m the thermal neutron capture reaction.

Experimental estimates on radiative strength function of low-energy ?-quanta following even-odd heavy nuclei decay

“…This shows the success of the analysis by the summed coincidences method. Comparison [21,22] with the known decay schemes (usually up to ~2 MeV) [23,24] confirms the reliability of the constructed decay schemes. Some new levels at a relatively high excitation energy of 3-4 MeV have been tentatively placed in the scheme.…”

“…The corresponding data are given in Figs. 4, 5. As the coefficient K is usually unknown, we, by taking ~c = 1, obtain the lower estimate on (K'Zg) which is acceptable, for example, when more than 80% of the sum primary transitions intensity has been observed in our spectra [21,22] and in the primary transition spectrum to cascade final levels [23,24].…”

“…According to [23] these two states are the 3 P1/2 and 3 P3/2 states, respectively. For 181Hf there are the primary transitions in cascades with the energy E 1 = 3.7 MeV and high-energy primary transitions, E 1 = 5.5 MeV [24]. According to [40] Earlier [34] we have already made notes on the correlation between the cascades intensity to final singleparticle states of deformed nuclei and the single-particle component of the compound-state wave function.…”

“…The radiative strength function is determined from the experimental primary transition intensities, Iy [21][22][23][24], by (3) and (4).…”

Unveiling the Defect Structure of Lithium Niobate with Nuclear Methods

“…Since these atoms are much less than 1 ppm of the total amount of Hf in the crystal, no effect can be detected by RBS. It thus seems reasonable to assume that the displacement is due to the recoil induced by emission of the γ photons from the 180 Hf(n,γ) 181 Hf reaction, characterized by Alenius et al [156]. As the maximum recoil that can be induced is 96 eV, corresponding to the emission of a 5.6 MeV γ photon, only one displacement per recoil is expected.…”