Electromagnetic moments of short lived beta emitters F-21, Mg-23, Si-27 and Ca-39
The beta-NMR spectra of {sup 21}F, {sup 23}Mg, {sup 27}Si and {sup 39}Ca which were produced in heavy ion collisions and implanted in various crystals have been observed. The magnetic moments of {sup 21}F and {sup 27}Si were determined to be {vert_bar}{mu}({sup 21}F){vert_bar} = 3.9194 {+-} 0.0012 {mu}{sub N} and {vert_bar}{mu}({sup 27}Si){vert_bar} = 0.8653 {+-} 0.0003 {mu}{sub N}, respectively. The electric quadrupole coupling constants were determined for the first time to be {vert_bar}eqQ({sup 21}F in MgF{sub 2})/h{vert_bar}= 9.94 {+-} 0.09 MHz, {vert_bar}eqQ({sup 23}Mg in MgF{sub 2})/h{vert_bar}= 1.96 {+-} 0.06 MHz, {vert_bar}eqQ({sup 27}Si in Al{sub 2}O{sub 3})/h{vert_bar}= 1.90 {+-} 0.12 MHz, {vert_bar}eqQ({sup 39}Ca in CaCO{sub 3})/h{vert_bar}= 0.60 {+-} 0.04 MHz. From the present eqQ/h, the Q moments were deduced as {vert_bar}Q({sup 21}F){vert_bar}= 110 {+-} 22 mb, {vert_bar}Q({sup 23}Mg){vert_bar}= 114 {+-} 3 mb, {vert_bar}Q({sup 27}Si){vert_bar}= 60 {+-} 13 mb and {vert_bar}Q({sup 39}Ca){vert_bar}= 36 {+-} 7 mb. The present data were compared with the theoretical values obtained by the OXBASH shell model code.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Director, Office of Science. Office of High Energy and Nuclear Physics. Division of Nuclear Physics (US)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 771860
- Report Number(s):
- LBNL-45924; R&D Project: 458056; TRN: US0100581
- Journal Information:
- Hyperfine Interactions, Vol. 120/121, Issue 1/8; ISSN 0304-3843
- Publisher:
- Springer
- Country of Publication:
- United States
- Language:
- English
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