Fazely and Liu reply

Fazely, A. R.; Liu, L. C.

doi:10.1103/physrevlett.59.2384

Cited by 12 publications

(14 citation statements)

References 6 publications

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“…(These points should be compared to the top of the peak in the theoretical spectrum. ) The shaded histogram represents strengths deduced from the (p, n) reaction [47,48], again displayed as described in Sec. II.…”

Section: Simentioning

confidence: 99%

Fragmentation of stretched spin strength inN=Zsd-shell nuclei

et al. 1992

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Calculations have been performed to explore the effect of configuration mixing in a large basis on the fragmentation of "stretched" M6 strength in the sd-shell nuclei Ne, Mg, Si, S, and Ar. This work elaborates on results for Si given previously, extends those calculations to neighboring N = Z nuclei with the same basis restriction (one particle in the 1frlq orbit and up to four particles in the 1dslq orbit) used in that earlier paper, and examines all self-conjugate sd-shell nuclei in a basis with one particle in the 1f7t2 orbit and unrestricted occupancy of the sd-shell orbits. It is found that configuration mixing in a large basis reproduces interesting features of the spectrum for Si arid S and gives an improved description of other properties of the observed 6 states, but fails to describe the observed spectrum in Mg. Emphasis is placed on the location of additional obser vable fragmen ts of the M 6 response.PACS number(s): 21.10. Re, 27.30.+t, 21.60.Cs, 23.20.Js

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Section: Simentioning

confidence: 99%

Fragmentation of stretched spin strength inN=Zsd-shell nuclei

et al. 1992

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“…In this scenario, the experimental study of other nuclear transitions where the nuclear charge is changed by two units leaving the mass number unvaried, in analogy to the ββ-decay, could provide important information. Past attempts to use pion-induced double charge exchange reactions [21], [22], [23], [24] to probe ββ-decay NMEs were abandoned due to the large differences in the structure of the operators [12]. Early studies of heavy-ion induced Double Charge Exchange (DCE) reactions were also not conclusive.…”

Section: Introductionmentioning

confidence: 99%

The NUMEN project: NUclear Matrix Elements for Neutrinoless double beta decay

et al. 2018

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The article describes the main achievements of the NUMEN project together with an updated and detailed overview of the related R&D activities and theoretical developments. NUMEN proposes an innovative technique to access the nuclear matrix elements entering the expression of the lifetime of the double beta decay by cross section measurements of heavy-ion induced Double Charge Exchange (DCE) reactions. Despite the two processes, namely neutrinoless double beta decay and DCE reactions, are triggered by the weak and strong interaction respectively, important analogies are suggested. The basic point is the coincidence of the initial and final state many-body wave-functions in the two types of processes and the formal similarity of the transition operators. First experimental results obtained at the INFN-LNS laboratory for the 40 Ca( 18 O, 18 Ne) 40 Ar reaction at 270 MeV, give encouraging indication on the capability of the proposed technique to access relevant quantitative information.The two major aspects for this project are the K800 Superconducting Cyclotron and MAGNEX spectrometer. The former is used for the acceleration of the required high resolution and low emittance heavy ion beams and the latter is the large acceptance magnetic spectrometer for the detection of the ejectiles. The use of the high-order trajectory reconstruction technique, implemented in MAGNEX, allows to reach the experimental resolution and sensitivity required for the accurate measurement of the DCE cross sections at forward angles. However, the tiny values of such cross sections and the resolution requirements demand beam intensities much larger than manageable with the present facility. The on-going upgrade of the INFN-LNS facilities in this perspective is part of the NUMEN project and will be discussed in the article.3

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“…In recent years, there have been several experiments to investigate these two-nucleon correlations by studying the sensitivity of pion double charge exchange (DCX) cross sections to neutron excess. Chains of isotopes were used for such a purpose, including calcium [1 -4], nickel [5,6], and tellurium isotopes [7,8]. Simple theoretical models of transitions to the double isobaric analog states (DIAS) and to the ground states (g. s. ) of the residual nuclei have been presented [9 -13].…”

Section: Introductionmentioning

confidence: 99%

Pion double charge exchange on the even selenium isotopes

et al. 1995

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Pion-induced double charge exchange (m+, v ) on " ' ' ' Se, leading to the double isobaric analog states (DIAS) and the ground states of ' ' ' Kr, has been studied at a laboratory angle of 5' and incident pion kinetic energy of 2S3.2 MeV. Cross sections for these transitions have been extracted, and those for the DIAS are compared to two simple models of pion double charge exchange. PACS number(s): 25.80.Gn, 27.50.+e

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Fazely and Liu reply

Cited by 12 publications

References 6 publications

Fragmentation of stretched spin strength inN=Zsd-shell nuclei

Fragmentation of stretched spin strength inN=Zsd-shell nuclei

The NUMEN project: NUclear Matrix Elements for Neutrinoless double beta decay

Pion double charge exchange on the even selenium isotopes

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