Universität zu Köln

Rosiak, D., Seidlitz, M., Reiter, P., Eberth, J., Hess, H., Hirsch, R., Steinbach, T., Warr, N., Le Galliard, C., Matea, I., Nguyen Trung, T. and Gottardo, A. (2019). Escape-suppression shield detector for the MINIBALL gamma-ray spectrometer. Eur. Phys. J. A, 55 (4). NEW YORK: SPRINGER. ISSN 1434-601X

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Abstract

A bismuth-germanate (BGO) escape-suppression shield for the high-purity germanium triple-cluster detector of the MINIBALL gamma-ray spectrometer was designed and built. Monte Carlo simulations with the simulation code GEANT4 were performed to guide the construction and to determine the detector geometry of the new BGO shield. After the first measurements concerning mechanical properties of the BGO housing and the performance of the photomultiplier tubes at the Institut de Physique Nucleaire, Orsay, the prototype BGO escape-suppression shield was combined with a MINIBALL triple-cluster detector at the Institut fur Kernphysik, Cologne. A dedicated electronics and digital data-acquisition system was put into operation in order to determine timing properties of the combined coincidence measurement and to measure values for the energy resolution of the BGO detectors, for the BGO low-energy threshold, and for the crucial peak-to-total ratio (P/T). The measured P/T value for a standard Co-60 gamma-ray source compares well with expectations and will allow to proceed with the amendment of the MINIBALL triple-cluster detectors with an escape-suppression shield for improved in-beam gamma-ray spectroscopy especially at the new HIE-ISOLDE accelerator for radioactive ion beams at CERN.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Rosiak, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Seidlitz, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Reiter, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Eberth, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hess, H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hirsch, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Steinbach, T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Warr, N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Le Galliard, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Matea, I. UNSPECIFIED UNSPECIFIED UNSPECIFIED Nguyen Trung, T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Gottardo, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-150873
DOI:	10.1140/epja/i2019-12702-x
Journal or Publication Title:	Eur. Phys. J. A
Volume:	55
Number:	4
Date:	2019
Publisher:	SPRINGER
Place of Publication:	NEW YORK
ISSN:	1434-601X
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language PERFORMANCE; ISOLDE Multiple languages Physics, Nuclear; Physics, Particles & Fields Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/15087