Mass and Spectroscopic Measurements in the Completed Mass-21 and -37 Isospin Quartets

Butler, G.W.; Cerny, Joseph; Cosper, S.W.; McGrath, Robert

doi:10.1103/physrev.166.1096

Cited by 51 publications

(80 citation statements)

References 27 publications

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“…The energy resolution obtained depended on the detector combination used but ranged between 25 keV and 45 keV FWHM. With this setup they reported 25 different βp decay branches and placed upper limits on the intensity of the βα decay branch between the IAS of 21 Na and the ground state of 17 F. A more recent experiment [6] also studied the β-decay of 21 Mg but they did not observe all the βp decay branches of [5]. However, they observed four βpγ transitions.…”

Section: Introductionmentioning

confidence: 99%

“…In the case of 21 Mg, Q EC = 13.098(16) MeV [4], the β + -decay to bound states of 21 Na has a branching ratio of 67(7) % [5]. The only other identified decay mode is β-delayed proton emission to states in 20 Ne, but βα, βαp, and βpα are all energetically allowed.…”

Section: Introductionmentioning

confidence: 99%

“…The only other identified decay mode is β-delayed proton emission to states in 20 Ne, but βα, βαp, and βpα are all energetically allowed. As the separation energies for such decays are quite high, S α = 6561.3(4) keV and S pα = S αp = 7161.5(3) keV [4], it is most likely to observe such low intensity decay modes as emissions from the Isobaric Analog State, IAS, with T z = 3 2 at an excitation energy of 8975(4) keV, as this state is strongly fed in the β-decay due to the similarity a e-mail: mvl07@phys.au.dk of the structure with the ground state of 21 Mg and the position of the IAS inside the Q EC -window.…”

Section: Introductionmentioning

confidence: 99%

“…An earlier experiment by Sextro et al [5] in 1973 used different ∆E-E Si telescope combinations to cover the entire energy range of the Q EC energy window, and a helium-jet transport system to get the 21 Mg activity away from the driver beam. The energy resolution obtained depended on the detector combination used but ranged between 25 keV and 45 keV FWHM.…”

Section: Introductionmentioning

confidence: 99%

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Beta-delayed proton emission from 21Mg

et al. 2015

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Abstract. Beta-delayed proton emission from 21 Mg has been measured at ISOLDE, CERN, with a detection setup including particle identification capabilities. β-delayed protons with center of mass energies between 0.39 MeV and 7.2 MeV were measured and used to determine the half life of 21 Mg as 118.6±0.5 ms. From a line shape fit of the βp branches we extract spectroscopic information about the resonances of 21 Na. Finally an improved interpretation of the decay scheme in accordance with the results obtained in reaction studies is presented.PACS. 23.40.Hc Relation with nuclear matrix elements and nuclear structure -27.30.+t 20 ≤ A ≤ 38 -29.30.Ep Charged-particle spectroscopy

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Beta-delayed proton emission from 21Mg

et al. 2015

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“…These detectors were incorporated in an identifier system of the power-law type. 30 The overall 30 [45][46][47] system is shown in Fig. 1 and a detailed description may be found elsewhere.…”

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confidence: 99%

Fragment Production in the Interaction of 5.5-GeV Protons with Uranium

1971

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'ABSTRACTThe energy spectra of nuclear fragments produced by the interaction of 5.5-GeV protons with uranium have been determined at several laboratory angles by means of dE/dx -E measurements with semiconductor detector telescopes. Individual isotopes of the elements from hydrogen to carbon were resolved and from nitrogen to argon the study was continued for the elements without isotopic separation. The evaporation-like energy spectra were integrated to obtain angular distributions and total cross sections for the isotopes of helium through carbon. Total cross sections for many rare isotopes were also estimated. The yield surface constructed from these cross sections has a ridge-like shape positioned 9ne neutron in excess of the line of beta stability. The yields fall off more steeply on the neutron-deficient side and exhibit odd-even effects reflecting those of the mass surface. The energy spectra of the neutron-deficient isotopes differ from the others in that the high-energy parts of the spectra are more pronounced and flatter, and the angular distributions are more forward peaked.Some of the energy spectra were fitted with calculated curves based on the isotropic evaporation df fragments from a system moving along the beam axis.The apparent Coulomb barriers obtained from this analysis were about one half -iv-UCRL-18996 the nominal Coulomb barriers and the apparent nuclear temperatures fell in the 10 to 13 MeV range. For the highest energy fragments observed at 90° the apparent temperatures rose to 20 MeV. From the forward-backward shifts in energy it was deduced that the average velocity of the moving system is about 0.006 c and that there is a positive correlation between this velocity and the velocity of the fragments in the moving system. However, all of the data are more peaked forward in intensity than can be explained by this simple two-step model.Radiochemical cross sections are also presented for the production of 7 Be from uranium, silver, and aluminum, and for 22 Na from aluminum. UCRL-18996

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Single-nucleon removal energies

Wagner

1973

Nuclear Structure Physics

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Mass and Spectroscopic Measurements in the Completed Mass-21 and -37 Isospin Quartets

Cited by 51 publications

References 27 publications

Beta-delayed proton emission from 21Mg

Beta-delayed proton emission from 21Mg

Fragment Production in the Interaction of 5.5-GeV Protons with Uranium

Single-nucleon removal energies

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