Polarization in fragmentation, <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>g</mi></math></span> factor of <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow></mrow><mrow><mn>35</mn></mrow></msup></mrow><mi mathvariant="normal">K</mi></math></span>

M. Schäfer; W.-D. Schmidt-Ott; T. Dörfler; T. Hild; T. Pfeiffer; R. Collatz; H. Geissel; M. Hellström; Z. Hu; H. Irnich; N. Iwasa; M. Pfützner; E. Roeckl; M. Shibata; B. Pfeiffer; K. Asahi; H. Izumi; H. Ogawa; H. Sato; H. Ueno; H. Okuno

doi:10.1103/PhysRevC.57.2205

Polarization in fragmentation, $g$ factor of $^{35} K$

M. Schäfer, W.-D. Schmidt-Ott, T. Dörfler, T. Hild, T. Pfeiffer, R. Collatz, H. Geissel, M. Hellström, Z. Hu, H. Irnich, N. Iwasa, M. Pfützner, E. Roeckl, M. Shibata, B. Pfeiffer, K. Asahi, H. Izumi, H. Ogawa, H. Sato, H. Ueno, and H. Okuno

Phys. Rev. C 57, 2205 – Published 1 May 1998

Abstract

Spin polarization $P > 1 %$ has been observed for $^{37} K$ fragments produced in the reaction $^{40} Ca +^{9} Be$ at 500 MeV/nucleon. The polarization was measured as a function of fragment longitudinal momentum (Goldhaber distribution). The experimental results are well described by a new Monte Carlo–based model. The $β$ -decay half-life of $^{35} K$ was remeasured as $t_{1 / 2} = 178 (8)$ ms. Using polarized $^{35} K$ fragments, the $g$ factor $g_{\exp} (^{35} K) = 0.24 (2)$ was measured. The magnetic moments of isospin $| T_{z} | = 3 / 2$ mirror pairs are discussed.

Received 26 August 1997

DOI:https://doi.org/10.1103/PhysRevC.57.2205

Authors & Affiliations

M. Schäfer^*, W.-D. Schmidt-Ott, T. Dörfler, T. Hild, and T. Pfeiffer

II. Physikalisches Institut, Universität Göttingen, D-37073 Göttingen, Germany

R. Collatz^†, H. Geissel, M. Hellström, Z. Hu, H. Irnich, N. Iwasa^‡, M. Pfützner, E. Roeckl, and M. Shibata^§

GSI-Darmstadt, D-64291 Darmstadt, Germany

B. Pfeiffer

Institut für Kernchemie, Universität Mainz, D-55099 Mainz, Germany

K. Asahi, H. Izumi^∥, H. Ogawa, and H. Sato^¶

Tokyo Institute of Technology, Meguro-ku, Tokyo 152, Japan

H. Ueno

Department of Physics, Osaka University, Toyonaka, Osaka 560, Japan

H. Okuno

The Institute of Physical and Chemical Research (RIKEN), Wako-shi, Saitama 351-01, Japan

^*Present address: Roland Berger & Partner GmbH, International Management Consultants, Arabellastraße 33, 81925 München, Germany.
^†Present address: EG&G GmbH, Verkaufsbüro Berlin, D-14197 Berlin, Germany.
^‡Present address: Department of Physics, Osaka University, Toyonaka, Osaka 560, Japan.
^§On leave from: School of Engineering, Nagoya University, Chigusa-ku, Nagoya 464-01, Japan.
^∥Present address: Department of Physics, Osaka University, Toyonaka, Osaka 560, Japan.
^¶Present address: The Institute of Physical and Chemical Research (RIKEN), Saitama 351-01, Japan.

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Vol. 57, Iss. 5 — May 1998

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