New Capture Gamma-Ray Library and Atlas of Spectra for All Elements

Abstract

A new library comprising 30 thousand neutron capture gamma rays has been created by combining new measurements on natural elements from Budapest and literature data for all stable isotope targets. All energies and intensities are consistent in that they are based on the chlorine and nitrogen standards, respectively. Accurate neutron binding energies and thermal capture cross-sections could also be inferred for all cases where the level scheme is sufficiently complete. The new data can be used for nuclear structure investigations, reaction model calculations, and a number of applications, such as Prompt Gamma-ray Activation Analysis (PGAA).

The Evaluated Gamma-ray Activation File (EGAF)

“…Notable examples include the analysis of deep sea vent [18] and reagent materials [19]. Total radiative cross sections were determined for most isotopes [8,20]. This work has contributed to a new evaluation of the 238 U total radiative cross section [22].…”

A novel hermetic detection system of KAPAE for measuring multiphoton decays of positronium

“…The 22 Na radioactive source decays to an excited state 22 Ne with the emission of a positron. The excited state, 22 Ne, emits 1.275 MeV gamma-rays for stabilization [20]. Because 1.275 MeV gamma-rays are produced simultaneously with a positron, they can also be used as a trigger signal, instead of a positron signal.…”

α decay half-lives of nuclei W, Re, Os, Ir and Pt in the range 157≤A≤193 using the modified generalised liquid drop model (MGLDM)

“…Heavy and superheavy nuclei and their decay properties are the main topics of research interests in nuclear physics today. Among the decay modes, α-decay is considered as the most important decay process due to the plenteous reliable information provided on nuclear structure such as ground state energy, half-life, deformation of nucleus, nuclear interaction and the spin and parity [1][2][3][4][5][6][7][8][9][10]. By observing α-decay series to a known daughter nuclei, this process can also be used to identify newly synthesized superheavy nuclei or unknown nuclei [11][12][13][14][15][16].…”