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Title: Investigations of Properties of {sup 89}Y Levels with Reactor Fast Neutrons

Abstract

By employing a beam of reactor fast neutrons, the spectrum of gamma rays up to an energy of 4.6MeV and their angular distributions with respect to the neutron-beamaxis aremeasured in the reaction {sup 89}Y(n, n'γ). The multipolarities and multipole-mixture parameters for 34 gamma transitions and the spin–parities J{sup π} of states excited in this reaction are determined. The lifetimes of the lowest 32 levels of 89Y were measured by the Doppler shift attenuation method, and the reduced probabilities for the respective gamma transitions were calculated. Levels of the K{sup π} = +5/2{sup +} and K{sup π} = −7/2{sup +} bands associated with, respectively, prolate and oblate deformation shapes are found in {sup 89}Y at low excitation energies.

Authors:
; ;  [1]
  1. National Research Center Kurchatov Institute (Russian Federation)
Publication Date:
OSTI Identifier:
22759633
Resource Type:
Journal Article
Journal Name:
Physics of Atomic Nuclei
Additional Journal Information:
Journal Volume: 80; Journal Issue: 6; Other Information: Copyright (c) 2017 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1063-7788
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ANGULAR DISTRIBUTION; BEAMS; DEFORMATION; DOPPLER EFFECT; EXCITATION; FAST NEUTRONS; GAMMA RADIATION; GAMMA SPECTRA; MULTIPOLARITY; PARITY; PHOTONUCLEAR REACTIONS; SPIN; YTTRIUM 89

Citation Formats

Govor, L. I., E-mail: l.govor@mail.ru, Kurkin, V. A., and Mikhailov, I. V. Investigations of Properties of {sup 89}Y Levels with Reactor Fast Neutrons. United States: N. p., 2017. Web. doi:10.1134/S1063778817060102.
Govor, L. I., E-mail: l.govor@mail.ru, Kurkin, V. A., & Mikhailov, I. V. Investigations of Properties of {sup 89}Y Levels with Reactor Fast Neutrons. United States. doi:10.1134/S1063778817060102.
Govor, L. I., E-mail: l.govor@mail.ru, Kurkin, V. A., and Mikhailov, I. V. Wed . "Investigations of Properties of {sup 89}Y Levels with Reactor Fast Neutrons". United States. doi:10.1134/S1063778817060102.
@article{osti_22759633,
title = {Investigations of Properties of {sup 89}Y Levels with Reactor Fast Neutrons},
author = {Govor, L. I., E-mail: l.govor@mail.ru and Kurkin, V. A. and Mikhailov, I. V.},
abstractNote = {By employing a beam of reactor fast neutrons, the spectrum of gamma rays up to an energy of 4.6MeV and their angular distributions with respect to the neutron-beamaxis aremeasured in the reaction {sup 89}Y(n, n'γ). The multipolarities and multipole-mixture parameters for 34 gamma transitions and the spin–parities J{sup π} of states excited in this reaction are determined. The lifetimes of the lowest 32 levels of 89Y were measured by the Doppler shift attenuation method, and the reduced probabilities for the respective gamma transitions were calculated. Levels of the K{sup π} = +5/2{sup +} and K{sup π} = −7/2{sup +} bands associated with, respectively, prolate and oblate deformation shapes are found in {sup 89}Y at low excitation energies.},
doi = {10.1134/S1063778817060102},
journal = {Physics of Atomic Nuclei},
issn = {1063-7788},
number = 6,
volume = 80,
place = {United States},
year = {2017},
month = {11}
}