A decay total absorption spectrometer for DESPEC at FAIR

J. L. Tain, A. Algora, J. Agramunt, V. Guadilla, M. D. Jordan, A. Montaner-Pizá, B. Rubio, E. Valencia, D. Cano-Ott, W. Gelletly, T. Martinez, E. Mendoza, Zs Podolyák, P. Regan, J. Simpson, A. J. Smith, J. Strachan

Research output: Contribution to journalArticle

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Abstract

This paper presents the design of a total absorption γ-ray spectrometer for the determination of β-decay intensity distributions of exotic nuclear species at the focal plane of the FAIR-NUSTAR Super Fragment Separator. The spectrometer is a key instrument in the DESPEC experiment and the proposed implementation follows extensive design studies and prototype tests. Two options were contemplated, based on NaI(Tl) and LaBr3:Ce inorganic scintillation crystals respectively. Monte Carlo simulations and technical considerations determined the optimal configurations consisting of sixteen 15×15×25cm3 crystals for the NaI(Tl) option and one hundred and twenty-eight 5.5×5.5×11cm3 crystals for the LaBr3:Ce option. Minimization of dead material was crucial for maximizing the spectrometer full-energy peak efficiency. Module prototypes were build to verify constructional details and characterize their performance. The measured energy and timing resolution was found to agree rather well with estimates based on simulations of scintillation light transport and collection. The neutron sensitivity of the spectrometer, important when measuring β-delayed neutron emitters, was investigated by means of Monte Carlo simulations.

Original languageEnglish
Pages (from-to)36-46
Number of pages11
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume803
DOIs
Publication statusPublished - Dec 11 2015

Fingerprint

Spectrometers
spectrometers
Scintillation
decay
Crystals
scintillation
Neutrons
prototypes
crystals
neutrons
simulation
separators
Separators
rays
emitters
modules
time measurement
fragments
optimization
energy

Keywords

  • Beta decay
  • High-energy beam fragmentation facilities
  • Scintillation detectors
  • Total absorption gamma-ray spectrometer

ASJC Scopus subject areas

  • Instrumentation
  • Nuclear and High Energy Physics

Cite this

A decay total absorption spectrometer for DESPEC at FAIR. / Tain, J. L.; Algora, A.; Agramunt, J.; Guadilla, V.; Jordan, M. D.; Montaner-Pizá, A.; Rubio, B.; Valencia, E.; Cano-Ott, D.; Gelletly, W.; Martinez, T.; Mendoza, E.; Podolyák, Zs; Regan, P.; Simpson, J.; Smith, A. J.; Strachan, J.

In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 803, 11.12.2015, p. 36-46.

Research output: Contribution to journalArticle

Tain, JL, Algora, A, Agramunt, J, Guadilla, V, Jordan, MD, Montaner-Pizá, A, Rubio, B, Valencia, E, Cano-Ott, D, Gelletly, W, Martinez, T, Mendoza, E, Podolyák, Z, Regan, P, Simpson, J, Smith, AJ & Strachan, J 2015, 'A decay total absorption spectrometer for DESPEC at FAIR', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 803, pp. 36-46. https://doi.org/10.1016/j.nima.2015.09.009
Tain, J. L. ; Algora, A. ; Agramunt, J. ; Guadilla, V. ; Jordan, M. D. ; Montaner-Pizá, A. ; Rubio, B. ; Valencia, E. ; Cano-Ott, D. ; Gelletly, W. ; Martinez, T. ; Mendoza, E. ; Podolyák, Zs ; Regan, P. ; Simpson, J. ; Smith, A. J. ; Strachan, J. / A decay total absorption spectrometer for DESPEC at FAIR. In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 2015 ; Vol. 803. pp. 36-46.
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