High-spin us isomer in 98Zr

A high-spin isomer in
98
Zr
, of half-life 1.9 (2) 𝜇⁢𝑠, has been observed using the Lohengrin mass spectrometer of the high-flux reactor of the Institut Laue-Langevin, Grenoble. The isomer was produced by the thermal-neutron induced fission of
239
Pu
. Measurements at the spectrometer focal point of 𝛾−𝑡 and 𝛾−𝛾−𝑡, relative to the arrival of a fission fragment, allowed the isomer to be identified and the level scheme constructed. The isomeric state at 6603.3 keV of excitation energy is tentatively assigned a spin and parity of (17−) and is proposed to have a 𝜋⁡(𝑔2
9/2)⁢𝜈⁡(𝑔1
7/2⁡ℎ1
11/2) configuration.

Authors: G.S. Simpson, J.A. Pinston, D. Balabanski, J. Genevey, G. Georgiev, J. Jolie, D.S. Judson, R. Orlandi, A. Scherillo, I. Tsekhanovich, W. Urban, N. Warr

Doi: 10.1103/PhysRevC.74.064308

Issue number:

Journal: Phys. Rev. C

Page number: 064308

Published on: 2006-12-12

Year: