TDPAD measurements with highly oriented pyrolytic graphite using the19F(p,p′)19F* and19F(α, n)22Na* reactions |
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| Authors: | P W Martin D Surono F-J Hambsch H Postma P Rietveld |
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| Institution: | (1) Commission of the European Communities Joint Research Centre, Institute for Reference Materials and Measurements, Retieseweg, 2440 Geel, Belgium;(2) Present address: Physics Department, University British Columbia, V6T 1Z1 Vancouver, B.C., Canada;(3) Present address: Physics Department, Technical University Delft, The Netherlands |
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| Abstract: | The TDPAD technique has been used to investigate quadrupole interactions of19F*(E
x
=197 keV,J
π=5/2+,T
1/2=88.5 ns) and22Na*(E
x
=583 keV,J
π=1+,T
1/2=243 ns) in highly oriented pyrolytic graphite (HOPG). For19F* a single static quadrupole interaction was found with field gradientV
ZZ
=3.24(19) × 1018 V/cm2. For the case of22Na* no quadrupole interaction was detected, leading to the conclusion that |QV
ZZ
|<5.2(5) × 1015 b V/cm2. TakingQ=0.06 b for the 583 keV state on the basis ofB(E2) measurements and theoretical estimates, we find that |V
ZZ
| <8.7(8) × 1016 V/cm2. The data demonstrate the advantages of using HOPG as a host material for the study of quadrupole interactions.
Former Central Bureau for Nuclear Measurements (CBNM). |
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| Keywords: | |
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