7He

Ground-State Decay Evaluated Data



Measured Ground-State Γcm for 7He

Adopted value: 150 ± 20 keV (2002TI10)
Measured Mass Excess for 7He

Adopted value: 26101 ± 17 keV (2003AU02)

Measurements
1960BA51: 7He; measured not abstracted; deduced nuclear properties.
1965DE08: 7He; measured not abstracted; deduced nuclear properties.
1967ST04: 7He; measured not abstracted; deduced nuclear properties.
1969ST02: 7Li(t, 3He), E = 22 MeV; measured Q, σ(E(3He), θ). 7He deduced ground-state level-width.
1977WE03: 9Be(6Li, 8B); E = 80.0, 93.3 MeV; measured σ(θ). 7He deduced structure parameters.
1984BR03: 7Li(n, p), E = 60 MeV; measured σ(θ). 7He deduced L = 1 dipole strength contribution.
1985AL29: 7Li(7Li, 7Be), E = 70 MeV; 9Be(6Li, 8B), E = 72 MeV; measured σ(E(7Be)), σ(E(8B)). 7He deduced possible level.
1985ALZM: 9Be(6Li, 8B), E = 72 MeV; measured σ(E(8B)). 7Li(7Li, 7Be), E = 70 MeV; measured σ(E(7Be)). 7He deduced levels.
1987BEYI: 7Li(11B, 11C), E = 88 MeV; 9Be(9Be, 11C), E = 106.7 MeV; 9Be(11B, 13N), E = 88 MeV; 9Be(14C, 16O), E = 152.6 MeV; measured σ(E(11C)), σ(E(13N)), σ(E(16O)). 7He deduced levels, Γ.
1987BEZI: 9Be(9Be, X), 7Li, 9Be(11B, X), 9Be(14C, X), E not given. 7He deduced possible levels.
1987BO40: 7Li(11B, 11C), Ecm = 34.2 MeV; 9Be(11B, 13N), Ecm = 39.6 MeV; 9Be(14C, 16O), Ecm = 60.26 MeV; measured energy spectra, σ(θ). 7He deduced levels, Γ.
1988BE34: 7Li(11B, 11C), E = 88, 87 MeV; 9Be(11B, 13N), E = 88 MeV; 9Be(14C, 16O), E = 152.6, 158 MeV; 9Be(9Be, 11C), E = 106.7 MeV; measured ejectile spectra. 7He deduced levels, parameters.
1988BEYJ: 9Be(14C, 16O), E not given; measured reaction σ. 7He deduced levels, Γ.
1990BEYY: 9Be(18O, 20Ne), E = 260.5 MeV; measured σ. 7He deduced mass excess.
1992AMZY: 10B, 9Be(π-, X), E at rest; measured pion, deuteron, triton spectra. 7He deduced resonance, Γ.
1995THZZ: 9Be(18O, X), E = 80 MeV/nucleon; measured (fragment)n-coin. 7He deduced neutron decay energies. 7He, from 9Be(18O, X), E = 80 MeV/nucleon; measured neutron decay energies
1995VO05: 6Li(14C, 13N), E = 335.9 MeV; measured residual nucleus spectra.
1998BO38: 9Be(15N, 17F), E = 240 MeV; measured particle spectra. 7He deduced resonances, J, π.
1998GO30: 9Be(π-, d), 11B(π-, 2d), 11B(π-, pt), 10B(π-, pd), E at rest; measured missing mass spectra. 7He deduced excited levels, widths.
1999BO26: 9Be(15N, 17F), E = 240 MeV; measured residual nuclei spectra. 7He deduced levels, possible J, π.
1999KO14: 1H(8He, d), E = 50 MeV/nucleon; measured σ(θ), deuteron spectra, nd-, (He)d-coin. 7He deduced excited state energy, width, possible J, π.
2000KO46: 1H(8He, d), E not given; measured deuteron spectra, (He)d-coin. 7He deduced excited state energy, width, possible J, π.
2001BO35: 9Be(15N, 17F), E = 240, 318.5 MeV; measured particle spectra, angular distributions. 7He deduced levels, J, π, resonance parameters.
2001GO35: 2H(6He, 7He), E = 37 MeV/nucleon; measured excitation energy spectra. 7He deduced no narrow excited states.
2001MA05: C(8He, 2nα), E = 227 MeV/nucleon; measured fragments relative energy spectra, σ(θ). 7He deduced resonance features.
2001NA29: 7Li(7Li, 7Be), E = 65 MeV/nucleon; measured particle spectra, σ(θ). 7He deduced resonance features, α-cluster structure.
2002KO19: 252Cf(SF); measured neutron, light charged particle, fission fragment spectra, angular correlations following ternary fission; deduced ternary fission yields, evidence for 7He.
2002KO24: 1H(8He, d), E = 50 MeV/nucleon; measured particle spectra. 7He deduced excited state.
2002ME07: C(8He, X), E = 227 MeV/nucleon; measured neutron and 6He momenta, (neutron)(6He)-coin, σ(E) following projectile breakup. 7He deduced ground state and resonance width, J, π, level scheme following compilation of earlier data.
2004YA12: 7Li(7Li, 7Be), E = 455 MeV; measured particle spectra, σ(E, θ). 7He deduced GDR energies, widths, α-cluster excitation.
2004YA21: 7Li(7Li, 7Be), E = 455 MeV; measured excitation energy spectra. 7He deduced dipole resonance energies, widths, Q-values for GDR excitation.
2005RO37: 1H(8He, 8He), E not given; measured recoil proton spectrum; deduced excitation function. 7He deduced analog states features.
2005WU08: 2H(6He, p), E = 69 MeV; measured particle spectra, σ(θ). 7He deduced ground-state J, π, excited state energy, width.
2005WUZZ: 2H(6He, p), E = 69 MeV; measured particle spectra, angular distributions. 7He deduced excited states.
2006GU22: 9Be(π-, 2pX), E at rest; measured Ep, missing mass spectra. 7He deduced possible resonance energies, widths.
2006NO11: (7Li, 7Be), E ≈ 8 MeV/nucleon; measured excitation energy spectra. 7He deduced excited states features.
2006SK03: 1H(8He, d), E = 15.7 MeV/nucleon; measured deuteron spectra, σ(θ); deduced spectroscopic factor. 7He deduced levels, J, π, resonant state.
2006WUZZ: 2H(6He, p), E = 69 MeV; measured Ep, σ(θ). 7He deduced level energies, spectroscopic factors.
2007GU24: 12C(π-, pα), E at rest; measured missing mass spectra.
2008DE29: Be(8Li, X), E = 41 MeV/nucleon; measured particle spectra, angular distributions. Deduced energy of ground-state resonances. 7He; deduced ground-state energies and widths.
2008WU05, 2008WUZZ: 2H(8Li, 3He), E = 76 MeV; measured charged particle spectra, (particle)(particle)-coin, angular distributions, σ, σ(θ), spectroscopic factors. 7He; deduced levels, J, π.
2009AK03: 12C(8He, Xn)7He, E = 227 MeV/nucleon; analyzed fragment spectra, neutron spectra, relative energy spectra; deduced resonance parameters using R-matrix analysis.
2011GUZX: 11B(π-, pt), (π-, 2d), E at rest; measured reaction products.Deduced missing mass spectrum, excited state energies.
2014GU23: 11B(π-, pt), (π-, 2d), E=low; measured reaction products. 7He; deduced energy levels, resonance widths.
2015GU03: 11B(π-, X)7He, E stopped; measured reaction products, missing mass spectra; deduced energy levels, resonance widths.
2016GU21: 7He deduced resonances, resonance parameters.
2016RE14: 9Be(6He, 8Be)7He, E=16.8 MeV. 7He deduced excitation energy spectrum, levels, resonances, J, π, width, spectroscopic factors.

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Last modified: 22 May 2018