An unambiguous Jπ assignment from γ-rays produced in heavy-ion reactions; The lowest J=6+, 38Ar level

Driel, M.A. Van; Engelbertink, G.A.P.; Eggenhuisen, H.H.; Ekström, L.P.; Hermans, J.A.J.

doi:10.1016/0370-2693(75)90086-6

Cited by 9 publications

(1 citation statement)

References 13 publications

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“…In these investigations, 3'-7 coincidence measurements play a major role [7][8][9][10][11][12][13]. To compare the present CSS with a bare Ge(Li) detector a 3'-3' coincidence experiment was performed.…”

Section: 21n-beam 7-7 Coincidence Resultsmentioning

confidence: 99%

A Compton-suppression spectrometer for γ-γ coincidence measurements: Large solid angle and excellent suppression

Aarts

Poel

Scherpenzeel

et al. 1980

Nuclear Instruments and Methods

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For 7-3' comcadence measurements a Compton-suppression spectrometer with a large sohd angle of 120 msr and excellent suppression has been designed. The dnnenslons of the NaI antlcomcldence shield have been opttmlzed by means of Monte Carlo calculations. The NaI shield has a length of 35 cm and a diameter of 30 cm. A 20% efficient HPGe crystal wth a dead layer of 0.22 mm and a hollow core ~s used as central detector For 6°Co, the average suppression of the Compton background between 100 and 1100 keV amounts to 11.8 with a photopeak loss of 5 8%. The areas of the 1173 and 1332 keV peaks taken together amount to 60% of the total number of registered counts for the suppressed spectrum and to 15% for the non-suppressed spectrum. The spectrometer has been tested in a 3"-3" comc~dence experiment w~th the reaction 24Mg + (45 MeV) ~ 60.

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Section: 21n-beam 7-7 Coincidence Resultsmentioning

confidence: 99%

A Compton-suppression spectrometer for γ-γ coincidence measurements: Large solid angle and excellent suppression

Aarts

Poel

Scherpenzeel

et al. 1980

Nuclear Instruments and Methods

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High-spin states in38Ar

et al. 1976

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The 7-decay of 93 3BAr levels between 6.84 and 10 MeV excitation energy has been measured using the 35C1(c~, P77) reaction at E~ = 14 MeV. A previous measurement of the same reaction could be exploited in the light of the present results, yielding spin(-parity) assignments J~(7,070)= 5-, J(7,507)= 7,5, J~(8,077)=7 +, J(8,129)= 5,6 and J(8,488)= 7,5. The ?,-decay modes of yrast levels, which have been previously observed in heavy ion induced reactions, are revised leading to major changes in their spin-parity assignments. New candidates for the J~ = 8-and 9 + levels were found in the levels at 9,644 and 9,928 keV excitation energy, respectively. A comparison of yrast levels with shell-model calculations is satisfying.

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Improvement of the performance of a Compton-suppression spectrometer by minimizing the dead layer of the central Ge detector

Aarts

Engelbertink

Poel

et al. 1980

Nuclear Instruments and Methods

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The performance of a Compton-suppression spectrometer is investigated for two different Ge crystals as central detector; a 126 cm3 Ge(Li) with a dead layer of 1.0 mm and a 90 cm3 HPGe with a dead layer of 0.22 mm. The thin dead layer HPGe gives a 32% improvement in the overall Compton suppression. Predictions of the influence of the dead-layer thickness by means of Monte Carlo calculations are in good agreement. The spectrometer is further tested with radioactive sources of **Y and t szEu and the in-beam reaction 24Mg + (45 MeV)160.

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An unambiguous Jπ assignment from γ-rays produced in heavy-ion reactions; The lowest J=6+, 38Ar level

Cited by 9 publications

References 13 publications

A Compton-suppression spectrometer for γ-γ coincidence measurements: Large solid angle and excellent suppression

A Compton-suppression spectrometer for γ-γ coincidence measurements: Large solid angle and excellent suppression

High-spin states in38Ar

Improvement of the performance of a Compton-suppression spectrometer by minimizing the dead layer of the central Ge detector

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