The Evaluated Gamma-ray Activation File (EGAF)

Abstract

Abstract. The Evaluated Gamma-ray Activation File (EGAF), a new database of prompt and delayed neutron capture γ ray cross sections, has been prepared as part of an International Atomic Energy Agency (IAEA) Coordinated Research Project to develop a "Database of Prompt Gamma-rays from Slow Neutron Capture for Elemental Analysis". Recent elemental γ-ray cross-section measurements performed with the guided neutron beam at the Budapest Reactor have been combined with data from the literature to produce the EGAF database. EGAF contains thermal cross sections for ≈35,000 prompt and delayed γ-rays from 262 isotopes. New precise total thermal radiative cross sections have been derived for many isotopes from the primary and secondary gamma-ray cross sections and additional level scheme data. An IAEA TECDOC describing the EGAF evaluation and tabulating the most prominent γ-rays will be published in 2004. The TECDOC will include a CD-ROM containing the EGAF database in both ENSDF and tabular formats with an interactive viewer for searching and displaying the data.

Nuclear structure of 187W studied with (n,γ) and (d,pБондаренко1, Tomandl2, Wirth3 et al. 2008Nuclear Physics A12240View full textAdd to dashboardCite

“…The weighted average value is 35.9(11) b. This agrees with the old BNL value 37.9(6) b [22] but deviates strongly from the value 20.3(3) b reported by Firestone [21].…”

“…Absolute intensities I γ of the present work in combination with the elemental partial γ -ray production cross sections σ elem γ of natural W measured at the Budapest reactor [21] allow us to recalculate the value of the thermal cross section of 186 W. We have deduced the value of the neutron radiative capture cross section for 2200 m/s neutrons using the equation:…”

“…We associate the new isomer with Table 1 Energies, absolute intensities and placement of γ -rays above 2 MeV assigned to the 186 W(n, γ ) 187 (8) 2258-0 2013.3 (9) 33 (14) 2090-77 2262.2(7) 21(8) -2018.58 (21) 42(6) d 2322-303 2274.13 (19) 118(16) d 2273-0 2023.33 (25) 64 (6) (20) 152 (19) (4) 68(11) -2290.1 (5) 173 (30) 5467-3176 2033.87 (25) 63 (7) -2291.7 (6) 148(38) d 2497-205 2037.00 (12) 176 (13) 2242-205 2295.3 (6) 86 (16) (17) 120(16) d 2045-0 2301.6(7) 47(11) d 2302-0 2048.4 (13) 27 (11) 2124-77 2308.18 (22) 55 (12) -2055.0 (10) 27 (11) 2260-205 2316.2(3) 65(14) d 2316-0 2061.8 (7) 101 (28) (4) 92 (7) -2333.5 (13) 48 (17) 2411-77 2076.8 (7) 88 (10) (12) 170 (18) 2242-146 2368.8 (6) 62(28) d 2514-146 2100.23 (16) 94 (14) d 2306-205 2371.4 (13) 37 (28) 2370-0 2108.1 (7) 83 …”

Improved FIFRELIN de-excitation model for neutrino applications

“…The Evaluated Gamma Activation File (EGAF) [14,22] is a database of prompt and delayed neutron-capture γ-ray cross sections. The database consists of data acquired from measurements performed at the Budapest Research Reactor in combination with data from literature [22]. The measurements were performed on natural elemental targets.…”

Non-destructive analysis of metals and alloys using prompt gamma activation analysis and complementary methods

“…Resonances are observed in the capture probability at higher incident neutron energies (For the resonances, see the cross section plot of 65 Cu around 1×10 3 -1×10 5 eV neutron energy in Figure 3). Neutron absorption results in a so-called compound nucleus.…”