Inelastic electron scattering from several Ca, Ti and Fe isotopes
Abstract
Differential cross sections for inelastic electron scattering from 40Ca, 42Ca, 44Ca, 46Ti, 48Ti, 50Ti and 56Fe have been measured. The cross sections for the strongly excited 2+, 3−, 4+ and 5− levels have been measured over a range of momentum transfer q of 0.4−2.6 fm−1. The data have been fitted using two representations for the transition charge, (i) the hydrodynamic liquid drop, and (ii) a phenomenological model.
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Nuclear Data Sheets for A=48
2022, Nuclear Data SheetsExperimental nuclear structure data from various reactions and decays are compiled and evaluated for all known nuclides with mass number A=48 (S, Cl, Ar, K, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni). For each nuclide, detailed evaluated nuclear structure information is presented for each individual reaction and decay, and the best values combining all available data are recommended for spectroscopic properties, such as level energies, half-lives, γ-ray energies and intensities, decay radiations. No excited states have been identified in 48S, 48Cl, 48Co and 48Ni, among which the first three even have no measured ground-state half-lives and decay modes. For 48Fe, a level scheme with a sequence of excited states was established for the first time from a recent one-neutron removal measurement by 2021Ya33. Data for excited states in 48Ar, 48K and 48Mn remain limited; no decay scheme has been measured for 48Ar and 48K yet, while the decay scheme for 48Ni is incomplete due to unobserved levels. 48Ti is the most studied nuclide through various reactions and decays, followed by 48V, 40Ca, 48Sc, and 48Cr, among which no decay event to 48Sc has been observed and the decay schemes for 48V and 48Cr are considered as incomplete. This work supersedes the previous full evaluations of A=48: 2006Bu08, 1993Bu04, 1985Al14, 1978Be01.
Nuclear Data Sheets for A=40
2017, Nuclear Data SheetsThe experimental nuclear structure data and decay data are evaluated for the known nuclides of mass 40 (Mg, Al, Si, P, S, Cl, Ar, K, Ca, Sc, Ti). Detailed evaluated nuclear structure information is presented with the best values recommended for level energies, half-lives, γ-ray energies and intensities, decay properties (energies, intensities and placement of radiations), and other spectroscopic data. The 40Ca and 40K nuclides remain as the most extensively studied from many different reactions and decays; no excited states are known in 40Mg, 40Al, 40P and 40Ti. This work supersedes the earlier full evaluation of A=40 by J. Cameron and B. Singh (2004Ca38).
Nuclear Data Sheets for A = 42
2016, Nuclear Data SheetsThe experimental data are evaluated for known nuclides of mass number A = 42 (Al, Si, P, S, Cl, Ar, K, Ca, Sc, Ti, V, Cr). Detailed evaluated level properties and related information are presented, including adopted values of level and γ–ray energies, decay data (energies, intensities and placement of radiations), and other spectroscopic data. This work supersedes earlier full evaluations of A = 42 published by B. Singh, J.A. Cameron – Nucl.Data Sheets 92, 1 (2001) and P.M. Endt – Nucl. Phys. A521, 1 (1990); Errata and Addenda Nucl. Phys. A529, 763 (1991); Errata Nucl. Phys. A564, 609 (1993) (also P.M. Endt – Nucl. Phys. A633, 1 (1998) update).
No excited states are known in 42Al, 42P, 42V and 42Cr, and structure information for 42Si and 42S is quite limited. There are no decay schemes available for the decay of 42Al, 42Si, 42P, 42V and 42Cr, while the decay schemes of 42Cl and 42Ti are incomplete in view of scarcity of data, and large gap between their Q–values and the highest energy levels populated in corresponding daughter nuclei. Structures of 42Ca, 42K, 42Sc and 42Ar nuclides remain the most extensively studied via many different nuclear reactions and decays.
An update of the B(E2) evaluation for 0<inf>1</inf><sup>+</sup>→2<inf>1</inf><sup>+</sup> transitions in even-even nuclei near N~Z~28
2012, Atomic Data and Nuclear Data TablesAn update of the B(E2) evaluation for even–even Cr, Fe, Ni, and Zn nuclei is presented. It is a continuation of work by Raman et al. on B(E2) values and was motivated by a large number of new measurements. It extends the previous evaluation from 20 to 38 nuclei and includes a comprehensive shell-model analysis. Evaluation policies for the analysis of experimental data are discussed. Future plans for a complete B(E2) evaluation of even–even nuclei are outlined.
Nuclear Data Sheets for A = 44
2011, Nuclear Data SheetsThe experimental data are evaluated for known nuclides of mass number A=44 (Si,P,S,Cl,Ar,K,Ca,Sc,Ti,V, Cr,Mn). Detailed evaluated level properties and related information are presented, including adopted values of level and γ-ray energies, decay data (energies, intensities and placement of radiations), and other spectroscopic data. This work supersedes earlier full evaluations of A=44 published by 1999Ca45 and 1990En08 (also 1998En04 update).
No excited states are known in 44Si, 44P, 44Cr, 44Mn. Only one excited state is known in 44V and its Isobaric Analog State (IAS) has been observed but with the level energy not known. Information for 44S, 44Cl and 44Ar is limited and their radioactive decay schemes seem incomplete in view of large Q values and known excitations much below than allowed by Q values. The 44Ca, 44Sc and 44Ti nuclides remain as the most extensively studied from many different reactions and decays.
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Present address: Physics Dept., Massachusetts Institute of Technology, Cambridge, Mass. 02139.