Ultra-sensitive γ-ray spectroscopy set-up for investigating primordial lithium problem

G. Gervino; C. Gustavino; D. Trezzi; M. Aliotta; M. Anders; A. Boeltzig; D. Bemmerer; A. Best; C. Broggini; C. Bruno; A. Caciolli; F. Cavanna; P. Corvisiero; T. Davinson; R. Depalo; A. DiLeva; Z. Elekes; F. Ferraro; A. Formicola; Zs Fülöp; A. Guglielmetti; Gy Gyürky; G. Imbriani; M. Junker; R. Menegazzo; P. Prati; D. A. Scott; O. Straniero; T. Szücs

doi:10.1016/j.nima.2015.11.019

Ultra-sensitive γ-ray spectroscopy set-up for investigating primordial lithium problem

G. Gervino^*, C. Gustavino, D. Trezzi, M. Aliotta, M. Anders, A. Boeltzig, D. Bemmerer, A. Best, C. Broggini, C. Bruno, A. Caciolli, F. Cavanna, P. Corvisiero, T. Davinson, R. Depalo, A. DiLeva, Z. Elekes, F. Ferraro, A. Formicola, Zs FülöpA. Guglielmetti, Gy Gyürky, G. Imbriani, M. Junker, R. Menegazzo, P. Prati, D. A. Scott, O. Straniero, T. Szücs

^*Corresponding author for this work

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract / Description of output

To precisely determine BBN ⁶Li production, the cross-section of the nuclear reaction ²H(α, γ)⁶Li must be directly measured within the astrophysical energy range of 30-400keV. This measure requires an ultra-low γ-ray background in the experimental set-up. We have realized the conditions matching these very strict requirements at LUNA, the deep underground accelerator laboratory active in the INFN Gran Sasso National Laboratory (LNGS), Italy: the γ-ray spectrometer background has been reduced down to reach unmatched low levels, comparable to the good ones experienced in dedicated off-line underground ultra low γ counting rate. We present and discuss the γ-ray background reduction reached in the HpGe spectrometer, where most of the remaining γ-ray background seen in the spectra are coming from the energetic deuterons scattered in the gas target by the α beam. Thanks to the low neutron environmental background at LUNA, the effect of this weak flux of 2-3MeV neutrons on HpGe detectors has been studied in details and the results are presented and discussed.

Original language	English
Pages (from-to)	617–619
Journal	Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	824
Early online date	12 Nov 2015
DOIs	https://doi.org/10.1016/j.nima.2015.11.019
Publication status	Published - Jul 2016

Keywords / Materials (for Non-textual outputs)

Gamma spectroscopy
Lithium problem
Underground Physics

Access to Document

10.1016/j.nima.2015.11.019

Cite this

Gervino, G., Gustavino, C., Trezzi, D., Aliotta, M., Anders, M., Boeltzig, A., Bemmerer, D., Best, A., Broggini, C., Bruno, C., Caciolli, A., Cavanna, F., Corvisiero, P., Davinson, T., Depalo, R., DiLeva, A., Elekes, Z., Ferraro, F., Formicola, A., ... Szücs, T. (2016). Ultra-sensitive γ-ray spectroscopy set-up for investigating primordial lithium problem. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 824, 617–619. https://doi.org/10.1016/j.nima.2015.11.019

@article{a376e5bd25bc44dbaa24c70ab910ded2,

title = "Ultra-sensitive γ-ray spectroscopy set-up for investigating primordial lithium problem",

abstract = "To precisely determine BBN 6Li production, the cross-section of the nuclear reaction 2H(α, γ)6Li must be directly measured within the astrophysical energy range of 30-400keV. This measure requires an ultra-low γ-ray background in the experimental set-up. We have realized the conditions matching these very strict requirements at LUNA, the deep underground accelerator laboratory active in the INFN Gran Sasso National Laboratory (LNGS), Italy: the γ-ray spectrometer background has been reduced down to reach unmatched low levels, comparable to the good ones experienced in dedicated off-line underground ultra low γ counting rate. We present and discuss the γ-ray background reduction reached in the HpGe spectrometer, where most of the remaining γ-ray background seen in the spectra are coming from the energetic deuterons scattered in the gas target by the α beam. Thanks to the low neutron environmental background at LUNA, the effect of this weak flux of 2-3MeV neutrons on HpGe detectors has been studied in details and the results are presented and discussed.",

keywords = "Gamma spectroscopy, Lithium problem, Underground Physics",

author = "G. Gervino and C. Gustavino and D. Trezzi and M. Aliotta and M. Anders and A. Boeltzig and D. Bemmerer and A. Best and C. Broggini and C. Bruno and A. Caciolli and F. Cavanna and P. Corvisiero and T. Davinson and R. Depalo and A. DiLeva and Z. Elekes and F. Ferraro and A. Formicola and Zs F{\"u}l{\"o}p and A. Guglielmetti and Gy Gy{\"u}rky and G. Imbriani and M. Junker and R. Menegazzo and P. Prati and Scott, {D. A.} and O. Straniero and T. Sz{\"u}cs",

year = "2016",

month = jul,

doi = "10.1016/j.nima.2015.11.019",

language = "English",

volume = "824",

pages = "617–619",

journal = "Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment",

issn = "0168-9002",

publisher = "Elsevier",

}

Gervino, G, Gustavino, C, Trezzi, D, Aliotta, M, Anders, M, Boeltzig, A, Bemmerer, D, Best, A, Broggini, C, Bruno, C, Caciolli, A, Cavanna, F, Corvisiero, P, Davinson, T, Depalo, R, DiLeva, A, Elekes, Z, Ferraro, F, Formicola, A, Fülöp, Z, Guglielmetti, A, Gyürky, G, Imbriani, G, Junker, M, Menegazzo, R, Prati, P, Scott, DA, Straniero, O & Szücs, T 2016, 'Ultra-sensitive γ-ray spectroscopy set-up for investigating primordial lithium problem', Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 824, pp. 617–619. https://doi.org/10.1016/j.nima.2015.11.019

TY - JOUR

T1 - Ultra-sensitive γ-ray spectroscopy set-up for investigating primordial lithium problem

AU - Gervino, G.

AU - Gustavino, C.

AU - Trezzi, D.

AU - Aliotta, M.

AU - Anders, M.

AU - Boeltzig, A.

AU - Bemmerer, D.

AU - Best, A.

AU - Broggini, C.

AU - Bruno, C.

AU - Caciolli, A.

AU - Cavanna, F.

AU - Corvisiero, P.

AU - Davinson, T.

AU - Depalo, R.

AU - DiLeva, A.

AU - Elekes, Z.

AU - Ferraro, F.

AU - Formicola, A.

AU - Fülöp, Zs

AU - Guglielmetti, A.

AU - Gyürky, Gy

AU - Imbriani, G.

AU - Junker, M.

AU - Menegazzo, R.

AU - Prati, P.

AU - Scott, D. A.

AU - Straniero, O.

AU - Szücs, T.

PY - 2016/7

Y1 - 2016/7

N2 - To precisely determine BBN 6Li production, the cross-section of the nuclear reaction 2H(α, γ)6Li must be directly measured within the astrophysical energy range of 30-400keV. This measure requires an ultra-low γ-ray background in the experimental set-up. We have realized the conditions matching these very strict requirements at LUNA, the deep underground accelerator laboratory active in the INFN Gran Sasso National Laboratory (LNGS), Italy: the γ-ray spectrometer background has been reduced down to reach unmatched low levels, comparable to the good ones experienced in dedicated off-line underground ultra low γ counting rate. We present and discuss the γ-ray background reduction reached in the HpGe spectrometer, where most of the remaining γ-ray background seen in the spectra are coming from the energetic deuterons scattered in the gas target by the α beam. Thanks to the low neutron environmental background at LUNA, the effect of this weak flux of 2-3MeV neutrons on HpGe detectors has been studied in details and the results are presented and discussed.

AB - To precisely determine BBN 6Li production, the cross-section of the nuclear reaction 2H(α, γ)6Li must be directly measured within the astrophysical energy range of 30-400keV. This measure requires an ultra-low γ-ray background in the experimental set-up. We have realized the conditions matching these very strict requirements at LUNA, the deep underground accelerator laboratory active in the INFN Gran Sasso National Laboratory (LNGS), Italy: the γ-ray spectrometer background has been reduced down to reach unmatched low levels, comparable to the good ones experienced in dedicated off-line underground ultra low γ counting rate. We present and discuss the γ-ray background reduction reached in the HpGe spectrometer, where most of the remaining γ-ray background seen in the spectra are coming from the energetic deuterons scattered in the gas target by the α beam. Thanks to the low neutron environmental background at LUNA, the effect of this weak flux of 2-3MeV neutrons on HpGe detectors has been studied in details and the results are presented and discussed.

KW - Gamma spectroscopy

KW - Lithium problem

KW - Underground Physics

UR - http://www.scopus.com/inward/record.url?scp=84947577022&partnerID=8YFLogxK

U2 - 10.1016/j.nima.2015.11.019

DO - 10.1016/j.nima.2015.11.019

M3 - Article

AN - SCOPUS:84947577022

SN - 0168-9002

VL - 824

SP - 617

EP - 619

JO - Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

JF - Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

ER -

Ultra-sensitive γ-ray spectroscopy set-up for investigating primordial lithium problem

Abstract / Description of output

Keywords / Materials (for Non-textual outputs)

Access to Document

Other files and links

Fingerprint

Edinburgh Nuclear Physics Group Consolidated Grant Proposal

Cite this

Ultra-sensitive γ-ray spectroscopy set-up for investigating primordial lithium problem

Abstract / Description of output

Keywords / Materials (for Non-textual outputs)

Access to Document

Other files and links

Fingerprint

Projects

Edinburgh Nuclear Physics Group Consolidated Grant Proposal

Cite this