High‐resolution integrated germanium Compton polarimeter for the γ‐ray energy range 80 keV–1 MeV

1995 ◽  
Vol 66 (6) ◽  
pp. 3653-3661 ◽  
Author(s):  
R. A. Sareen ◽  
W. Urban ◽  
A. R. Barnett ◽  
B. J. Varley
Keyword(s):  
High Resolution ◽  
Energy Range ◽  
Γ Ray

Gamma-ray production in the 170Er(p,n)170Tm nuclear reaction

Open Physics ◽  
2010 ◽  
Vol 8 (4) ◽  
Author(s):  
Alexandru Mihailescu ◽  
Gheorghe Cata-Danil
Keyword(s):  
High Resolution ◽  
Energy Range ◽  
Nuclear Reaction ◽  
Gamma Rays ◽  
Compound Nucleus ◽  
Beam Energy ◽  
Gamma Ray ◽  
Excitation Functions ◽  
Γ Ray ◽  
First Time

AbstractFor the first time discrete gamma-rays following the nuclear reaction 170Er(p,n)170Tm with enriched target were measured with a high resolution GeHP spectrometer. Protons delivered by the Bucharest FN Tandem Van de Graaff accelerator bombarded a thin self-supporting film of enriched erbium. Measured γ-ray energies (Eγ), their relative intensities (Iγ) and corresponding excitation functions for the beam energy range 2.0–3.6 MeV are reported in the present work. The measured excitation functions were fairly well reproduced by compound nucleus calculations based on the Hauser-Feshbach formalism.

A high resolution γ-ray polarimeter for the 100 to 800 keV energy range

1980 ◽  
Vol 169 (3) ◽  
pp. 527-532 ◽  
Author(s):  
Tasneem A. Khan ◽  
H. Milchberg ◽  
N.C. Singhal ◽  
M.W. Johns
Keyword(s):  
High Resolution ◽  
Energy Range ◽  
Γ Ray

Low Angular Momentum States Populated in the Decay of 178Lu

1971 ◽  
Vol 49 (2) ◽  
pp. 270-276 ◽  
Author(s):  
S. C. Gujrathi ◽  
J. M. D'Auria
Keyword(s):  
Angular Momentum ◽  
High Resolution ◽  
Energy Range ◽  
Beta Decay ◽  
Decay Scheme ◽  
High Efficiency ◽  
Branching Ratios ◽  
Coincidence System ◽  
Γ Ray ◽  
Gamma Transitions

The low angular momentum states in 178Hf populated in the beta decay of the low spin state (T1/2 = 30 min) of 178Lu are investigated with both high resolution and high efficiency Ge(Li) detectors as well as a NaI(Tl)–Ge(Li) (γ,γ) coincidence system. The sources of 178Lu were produced through the 178Hf(n,p) and 181Ta(n,α) reactions on natural targets of hafnium and tantalum, respectively, using 14.8 MeV neutrons. Sixteen gamma transitions in the energy range 1090.8 to 1730.0 keV have been found to decay with the 30 min period of 178Lu. A decay scheme of 178Lu has been proposed with the excited levels in 178Hf at 93.17(2+), 306.59(4+), 1309.7(0+, 1±), 1362.7(0+, 1±, 2+), 1434.2(0+), 1442.9(0+), 1496.7(2+), 1514.2(2+), 1562.0(2+), 1772.1(0+, 1±, 2+), and 1823.2(0+, 1±, 2+) keV. The weak β-branching ratios and their log ft values are deduced from the observed γ-ray intensities and results thus obtained are discussed.

scholarly journals Study of nuclear physics input-parameters via high-resolution γ-ray spectroscopy

2017 ◽  
Vol 165 ◽  
pp. 01044
Author(s):  
Philipp Scholz ◽  
Felix Heim ◽  
Jan Mayer ◽  
Mark Spieker ◽  
Andreas Zilges
Keyword(s):  
High Resolution ◽  
Nuclear Physics ◽  
Input Parameters ◽  
Γ Ray

scholarly journals CROSS-SECTIONS FOR PHOTONUCLEAR REACTIONS 93Nb(γ,n)92mNb AND 93Nb(γ,n)92tNb IN THE END-POINT BREMSSTRAHLUNG ENERGIES 36...91 MeV

2020 ◽  
pp. 148-153
Author(s):  
A.N. Vodin ◽  
O.S. Deiev ◽  
I.S. Timchenko ◽  
S.N. Olejnik ◽  
A.S. Kachan ◽  
...  
Keyword(s):  
Energy Range ◽  
Cross Sections ◽  
Maximum Energy ◽  
Reaction Cross ◽  
Bremsstrahlung Spectrum ◽  
Photonuclear Reactions ◽  
End Point ◽  
Γ Ray ◽  
First Time ◽  
Good Agreement

The flux-weighted averaged over the energy range of bremsstrahlung spectrum from reaction threshold up to the maximum energy of γ-ray cross-sections <σ(E)> of the 93Nb(γ,n)92mNb and 93Nb(γ,n)92tNb photonuclear reactions were determined by the gamma-activation method within the end-point bremsstrahlung energies Еmax = 36…91 MeV. Activation of 93Nb targets has been done by a bremsstrahlung flux using an electron beam at the linear accelerator LUE-40 at RDC "Accelerator" NSC KIPT. The γ-ray spectra of irradiated targets were registered using the HPGe detector with an energy resolution of 1.8 keV for the 1332 keV line 60Co. To control the bremsstrahlung flux we used natMo witness-targets and a reaction cross-section of 100Mo(γ,n)99Mo. Obtained experimental cross-sections <σ(E)> of the studied reactions are in good agreement with the theoretical values calculated within TALYS 1.9 code and the results of other authors. The averaged cross-sections <σ(E)> of the 93Nb(γ,n)92mNb and 93Nb(γ,n)92tNb reactions in the energy range 35...45 MeV and > 70 MeV were obtained for the first time.

High resolution in-beam γ-ray spectroscopy

1985 ◽  
Author(s):  
J. Kern ◽  
J. -Cl. Dousse ◽  
M. Gasser ◽  
B. Perny ◽  
Ch. Rhe^me
Keyword(s):  
High Resolution ◽  
Γ Ray

scholarly journals Gamma-ray counterparts of 2WHSP high-synchrotron-peaked BL Lac objects as possible signatures of ultra-high-energy cosmic ray emission

2020 ◽  
Vol 497 (2) ◽  
pp. 2455-2468
Author(s):  
Michael W Toomey ◽  
Foteini Oikonomou ◽  
Kohta Murase
Keyword(s):  
Energy Range ◽  
Gamma Ray ◽  
Cosmic Ray ◽  
High Energy ◽  
Potential Candidate ◽  
Ultra High Energy ◽  
Bl Lac Objects ◽  
Cherenkov Telescopes ◽  
Bl Lac ◽  
Γ Ray

ABSTRACT We present a search for high-energy γ-ray emission from 566 Active Galactic Nuclei at redshift z &gt; 0.2, from the 2WHSP catalogue of high-synchrotron peaked BL Lac objects with 8 yr of Fermi-LAT data. We focus on a redshift range where electromagnetic cascade emission induced by ultra-high-energy cosmic rays can be distinguished from leptonic emission based on the spectral properties of the sources. Our analysis leads to the detection of 160 sources above ≈5σ (TS ≥25) in the 1–300 GeV energy range. By discriminating significant sources based on their γ-ray fluxes, variability properties, and photon index in the Fermi-LAT energy range, and modelling the expected hadronic signal in the TeV regime, we select a list of promising sources as potential candidate ultra-high-energy cosmic ray emitters for follow-up observations by Imaging Atmospheric Cherenkov Telescopes.

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