The Design and Construction of a Scintillation Pair Spectrometer for the Detection of $gamma$ Rays in the Energy Range 2-20 Mev. Thesis submitted to Univ. of Grenoble, France; REALISATION D'UN SPECTROMETRE A SCINTILLATIONS ET A PAIRES POUR LA DETECTION DES RAYONNEMENTS $gamma$ D'ENERGIE COMPRISE ENTRE 2 ET 20 Mev
The scintillation-pair spectrometer is designed to allow the measurement of the energy of gamma rays in the range 2 to 20 Mev. Such an instrument is chosen because of its high energy resolution and ease of working; however, the efficiency is low. It was possible to tolerate this low efficiency because of the facts that the gamma rays studied emanated from (p, gamma ) reactions and that the two electrostatic acceleratons available could provide beams of 500 mu a having energy maxima at 300 and 600 kev. The gamma rays produced by the reactions Na/sup 23/(p, gamma )Mg/sup 24/, F/sup 19/(p, alpha gamma )O/sup 16/, and Li/sup 7/(p, gamma )B e/sup 8/ were used as well as the gamma rays emitted by sources of RTh and of Na/sup 24/. Under these conditions the spectrometer attained a resolving power of 6.5 plus or minus 0.5% at 6.1 Mev, and it was able to separate the 14.8 and 17.6 Mev lines produced by the reaction Li/sup 7/ (p, gamma )Be/sup 8/. As well as this, the efficiency, which varied from 2 x 10/ sup -4/ to 1.7 x 10/sup -3/ between 2 and 20 Mev, was well above the efficiencies already obtained with this type of instrument. (auth)
- Research Organization:
- France. Commissariat a l'Energie Atomique. Centre d'Etudes Nucleaires, Saclay
- NSA Number:
- NSA-15-002790
- OSTI ID:
- 4148595
- Report Number(s):
- CEA-1400
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-61
- Country of Publication:
- France
- Language:
- English
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