Evidence for chiral symmetry breaking in <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow></mrow><mrow><mn>136</mn></mrow></msup></mrow><mi mathvariant="normal">Pm</mi></math></span> and <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow></mrow><mrow><mn>138</mn></mrow></msup></mrow><mi mathvariant="normal">Eu</mi></math></span>

A. A. Hecht; C. W. Beausang; K. E. Zyromski; D. L. Balabanski; C. J. Barton; M. A. Caprio; R. F. Casten; J. R. Cooper; D. J. Hartley; R. Krücken; D. Meyer; H. Newman; J. R. Novak; E. S. Paul; N. Pietralla; A. Wolf; N. V. Zamfir; Jing-Ye Zhang; F. Dönau

doi:10.1103/PhysRevC.63.051302

Rapid Communication

Evidence for chiral symmetry breaking in $^{136} Pm$ and $^{138} Eu$

A. A. Hecht, C. W. Beausang, K. E. Zyromski, D. L. Balabanski, C. J. Barton, M. A. Caprio, R. F. Casten, J. R. Cooper, D. J. Hartley, R. Krücken, D. Meyer, H. Newman, J. R. Novak, E. S. Paul, N. Pietralla, A. Wolf, N. V. Zamfir, Jing-Ye Zhang, and F. Dönau

Phys. Rev. C 63, 051302(R) – Published 12 April 2001

Abstract

High-spin states in the doubly odd $N = 75$ nuclei $^{136} Pm$ and $^{138} Eu$ were populated following the $^{116} Sn (^{24} Mg, p 3 n)$ and $^{106} Cd (^{35} Cl, 2 p n)$ reactions, respectively. A new $Δ I = 1$ band is reported in $^{138} Eu$ and new data are presented for the recently reported band in $^{136} Pm .$ Polarization and angular correlation measurements have been performed to establish the relative spin and parity assignments for these bands. Both bands have been assigned the same $π h_{11 / 2} \otimes ν h_{11 / 2}$ structure as the yrast band and are suggested as candidates for chiral twin bands.

Received 22 January 2001

DOI:https://doi.org/10.1103/PhysRevC.63.051302

Authors & Affiliations

A. A. Hecht¹, C. W. Beausang¹, K. E. Zyromski¹, D. L. Balabanski^2,3, C. J. Barton^1,5, M. A. Caprio¹, R. F. Casten¹, J. R. Cooper¹, D. J. Hartley², R. Krücken¹, D. Meyer¹, H. Newman¹, J. R. Novak¹, E. S. Paul⁴, N. Pietralla¹, A. Wolf^1,5,6, N. V. Zamfir^1,5,7, Jing-Ye Zhang^1,2, and F. Dönau⁸

¹Wright Nuclear Structure Laboratory, Physics Department, Yale University, New Haven, Connecticut 06520
²Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996
³Faculty of Physics, St. Kliment Ohridsky University of Sofia, BG-1164 Sofia, Bulgaria
⁴Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE, United Kingdom
⁵Department of Physics, Clark University, Worcester, Massachusetts 10610
⁶Nuclear Research Center—Negev, Beer Sheva 84190, Israel
⁷National Institute for Physics and Nuclear Engineering, Bucharest, Romania
⁸Forschungszentrum Rossendorf e.V., D-01314 Dresden, Germany

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Vol. 63, Iss. 5 — May 2001

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