Reed, H(erbert) Owen

Berz, William

doi:10.1093/gmo/9781561592630.article.a2085502

Cited by 3 publications

(5 citation statements)

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“…The result Q 2p ( 30 Ar) = 2.45 +0.05 −0.10 MeV is somewhat different compared to the first-reported value Q 2p ( 30 Ar) = 2.25 +0. 15 −0.10 MeV from Ref. [12], but consistent within the error bars.…”

Section: Transition Dynamics Of 30 Ar Ground State Decaysupporting

confidence: 79%

“…Fig. 1 shows the ion-optical setting of the FRS used in the experiment, which was calculated with the code GICOSY [15,16]. The colored lines show the trajectories of 31 Ar ions at three different energies, each at five different angles after production by fragmenting a 36 Ar beam on the 9 Be production target.…”

Section: Methodsmentioning

confidence: 99%

“…of 30 Ar was found to be at 2.25 +0. 15 −0.10 MeV above the 2p emission threshold [12]. A sophisticated data analysis together with theoretical investigations revealed that the g.s.…”

Section: Introductionmentioning

confidence: 97%

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Spectroscopy of excited states of unbound nuclei Ar30 and Cl29

Xu¹,

Mukha²,

Grigorenko³

et al. 2018

Phys. Rev. C

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appear in the even-proton number (Z) isotopes beyond the proton drip-line, in which one-proton (1p) emission is energetically prohibited but the ejection of two protons is energetically allowed due to the pairing interaction. More than 40 years after its prediction, ground-state 2p radioactivity was discovered in 2002 [2,3]. Two experiments independently observed that the ground state (g.s.) of 45 Fe decays by simultaneous emission of two protons. Later 54 Zn [4], 19 Mg [5], 48 Ni [6], and 67 Kr [7] were found to be other g.s. 2p radioactive nuclei. Among the g.s. 2p emitters hitherto observed, the halflives of 45 Fe, 48 Ni, and 54 Zn are in the range of several ms,

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Section: Transition Dynamics Of 30 Ar Ground State Decaysupporting

confidence: 79%

Section: Methodsmentioning

confidence: 99%

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Spectroscopy of excited states of unbound nuclei Ar30 and Cl29

Xu¹,

Mukha²,

Grigorenko³

et al. 2018

Phys. Rev. C

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“…An alternative is the method of fringe field integrals [25,26] which yields practically the same results. Both are implemented into the GICOSY code [27,28] used for the analysis.…”

Section: Fringe Fieldsmentioning

confidence: 99%

Isochronicity correction in the CR storage ring

Litvinov

Toprek

Weick

et al. 2013

Nuclear Instruments and Methods in Physics Research Section A:

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A challenge for nuclear physics is to measure masses of exotic nuclei up to the limits of nuclear existence which are characterized by low production cross sections and short half-lives. The large acceptance Collector Ring (CR) [1] at FAIR [2] tuned in the isochronous ion-optical mode offers unique possibilities for measuring short-lived and very exotic nuclides. However, in a ring designed for maximal acceptance, many factors limit the resolution. One point is a limit in time resolution inversely proportional to the transverse emittance. But most of the time aberrations can be corrected and others become small for large number of turns. We show the relations of the time correction to the corresponding transverse focusing and that the main correction for large emittance corresponds directly to the chromaticity correction for transverse focusing of the beam. With the help of Monte-Carlo simulations for the full acceptance we demonstrate how to correct the revolution times so that in principle resolutions of ∆m/m = 10 −6 can be achieved. In these calculations the influence of magnet inhomogeneities and extended fringe fields are considered and a calibration scheme also for ions with different mass-to-charge ratio is presented.

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“…The transferred and induced proton polarizations at the focal plane were extracted using the maximum likelihood method taking into account the beam helicity state for each event [13]. The focal plane polarizations were trans-ported back to the target using COSY [31], a differential algebra based code. A detailed description of the polarimeter can be found in [32,33].…”

mentioning

confidence: 99%

Polarization observables in deuteron photodisintegration below 360 MeV

et al. 2011

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High precision measurements of induced and transferred recoil proton polarization in d( γ, p)n have been performed for photon energies of 277-357 MeV and θcm = 20• -120• . The measurements were motivated by a longstanding discrepancy between meson-baryon model calculations and data at higher energies. At the low energies of this experiment, theory continues to fail to reproduce the data, indicating that either something is missing in the calculations and/or there is a problem with the accuracy of the nucleon-nucleon potential being used. PACS numbers: 21.30.Fe, 24.70.+s, 25.10.+s, The conventional nuclear model uses baryon and meson degrees of freedom to describe nuclear structure and reac-

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Reed, H(erbert) Owen

Cited by 3 publications

References 0 publications

Spectroscopy of excited states of unbound nuclei Ar30 and Cl29

Spectroscopy of excited states of unbound nuclei Ar30 and Cl29

Isochronicity correction in the CR storage ring

Polarization observables in deuteron photodisintegration below 360 MeV

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