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Electromagnetic moments of short lived β emitters 21F, 23Mg, 27Si and 39Ca.

Authors :: Matsuta, K.
Onishi, T.
Fukuda, M.
Minamisono, T.
Akai, H.
Sasaki, M.
Yamaguchi, T.
Miyake, T.
Sato, K.
Minamisono, K.
Ohsumi, F.
Muramoto, Y.
Oui, S.
Ha, C.
Tanaka, K.
Kidera, K.
Morishita, A.
Kitagawa, A.
Torikoshi, M.
Kanazawa, M.
Source :: Hyperfine Interactions; Sep1999, Vol. 120/121 Issue 1-8, p673-677, 5p
Publication Year :: 1999
Abstract: The β-NMR spectra of <superscript>21</superscript>F, <superscript>23</superscript>Mg, <superscript>27</superscript>Si and <superscript>39</superscript>Ca which were produced in heavy ion collisions and implanted in various crystals have been observed. The magnetic moments of <superscript>21</superscript>F and <superscript>27</superscript>Si were determined to be |μ(<superscript>21</superscript>F)| = 3.9194 ± 0.0012 μ<subscript>N</subscript> and |μ(<superscript>27</superscript>Si)| = 0.8653 ± 0.0003 μ<subscript>N</subscript>, respectively. The electric quadrupole coupling constants were determined for the first time to be |eqQ(<superscript>21</superscript>F in MgF<subscript>2</subscript>)/h|= 9.94 ± 0.09 MHz, |eqQ(<superscript>23</superscript>Mg in MgF<subscript>2</subscript>)/h|= 1.96 ± 0.06 MHz, |eqQ(<superscript>27</superscript>Si in Al<subscript>2</subscript>O<subscript>3</subscript>)/h|= 1.90 ± 0.12 MHz, |eqQ(<superscript>39</superscript>Ca in CaCO<subscript>3</subscript>)/h|= 0.60 ± 0.04 MHz. From the present eqQ/h, the Q moments were deduced as |Q(<superscript>21</superscript>F)|= 110 ± 22 mb, |Q(<superscript>23</superscript>Mg)|= 114 ± 3 mb, |Q(<superscript>27</superscript>Si)|= 60 ± 13 mb and |Q(<superscript>39</superscript>Ca)|= 36± 7 mb. The present data were compared with the theoretical values obtained by the OXBASH shell model code. [ABSTRACT FROM AUTHOR]