Efficiency stability of HPGe detectors  under distinct count rates

The 241Am(n,2n)240Am reaction cross section has been measured at neutron beam energy 17.5 MeV, relative to the 27Al(n,α)24Na, 197Au(n,2n)196Au and 93Nb(n,2n)92mNb reference reaction cross sections, using the activation technique. The irradiation was carried out at the Van der Graaff 5.5 MV Tandem accelerator laboratory of NCSR “Demokritos” with monoenergetic neutron beam provided by means of the 3H(d,n)4He reaction, implementing a new Ti-tritiated target. The high purity Am target has been constructed at IRMM, Geel, Belgium and consisted of 40 mg 241Am in the form of AmO2 pressed into pellet with Al2O3 and encapsulated into Al container. Due to this high radioactivity (5 GBq), the Am target was enclosed in a Pb container for safety reasons. After the end of the irradiation, the activity induced by the neutron beam at the target and reference foils, was measured off-line by two 100%, a 50% and a 16% relative efficiency, HPGe detectors.

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HPGe detectors long time behaviour in high-resolution γ spectrometry

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment ◽

10.1016/j.nima.2011.03.031 ◽

2011 ◽

Vol 648 (1) ◽

pp. 132-138 ◽

Cited By ~ 5

Author(s):

L. Sajo-Bohus ◽

D. Rosso ◽

A.M. Sajo Castelli ◽

D.R. Napoli ◽

E. Fioretto ◽

...

Keyword(s):

High Resolution ◽

Time Behaviour ◽

Long Time Behaviour ◽

Hpge Detectors ◽

Long Time ◽

Γ Spectrometry

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LOW-SPIN STATES OF 76Se EXCITED IN 76Br(β++EC)76Se DECAY

International Journal of Modern Physics E ◽

10.1142/s0218301304002600 ◽

2004 ◽

Vol 13 (05) ◽

pp. 933-947

Author(s):

YAN LI ◽

SHUIFA SHEN ◽

WENDA HUANG ◽

SHUANGHUI SHI ◽

JIAHUI GU ◽

...

Keyword(s):

High Resolution ◽

Energy Levels ◽

Spin States ◽

Hpge Detectors ◽

New Energy ◽

Coincidence Mode ◽

Γ Rays ◽

First Time

The decay of bromine-76 was studied using high resolution HpGe detectors in singles and coincidence mode. Bromine-76 was produced via two reactions: 75 As (α,3 n )76 Br and 76 Se ( p , n )76 Br . The results of these experiments verified the previously reported levels of 76 Se . In addition to the previously described transitions and levels, 37 new γ-rays and 15 new energy levels were found for the first time.

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Experimental measurement of the 12C+16O fusion cross sections at astrophysical energies

EPJ Web of Conferences ◽

10.1051/epjconf/201817804008 ◽

2018 ◽

Vol 178 ◽

pp. 04008

Author(s):

X. Fang ◽

W. P. Tan ◽

M. Beard ◽

R. J. deBoer ◽

G. Gilardy ◽

...

Keyword(s):

Cross Sections ◽

Center Of Mass ◽

Model Calculations ◽

Center Of Mass Energy ◽

Pure Graphite ◽

S Factor ◽

Hpge Detectors ◽

Low Energies ◽

The University

The total cross sections of the 12C+16O fusion have been experimentally determined at low energies to investigate the role of this reaction during late stellar evolution burning phases. A high-intensity oxygen beam was produced by the 5MV pelletron accelerator at the University of Notre Dame impinging on a thick ultra-pure graphite target. Protons and γ-rays were measured simultaneously in the center-of-mass energy range from 3.64 to 5.01 MeV, using strip silicon and HPGe detectors. Statistical model calculations were employed to interpret the experimental results. A new broad resonance-like structure is observed for the 12C+16O reaction, and a decreasing trend of its S-factor towards low energies is found.

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