M ar 2 00 8 Quadrupole Moment of 37
نویسنده
چکیده
The electric quadrupole coupling constant of the ground state of 37K(Iπ = 3/2+, T1/2 = 1.22 s) in a tetragonal KH2PO4 single crystal was measured to be |eqQ/h| = 2.99± 0.07 MHz using the β-ray detecting nuclear quadrupole resonance technique. The electric quadrupole moment of 37K was determined to be |Q(37K)| = 10.6 ± 0.4 efm2, where the known electric quadrupole coupling constant of stable 39K in the KH2PO4 crystal was used as a reference. The present experimental result is larger than that predicted by shell-model calculations in the sd or the sd and fp model spaces. A possible variation of effective charges was explored to explain the discrepancy.
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