Δ excitations in nuclei and their decay properties

Udagawa, T.; Oltmanns, P.; Osterfeld, F.; Hong, Seung-Woo

doi:10.1103/physrevc.49.3162

Cited by 48 publications

(41 citation statements)

References 48 publications

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“…The center and amplitude of the IE peak shows a remarkable target dependence. The energy transfer for H target agrees with the previous results [1,4]. The energy transfer for C target shows a remarkable reduction compared with H target.…”

Section: -P2supporting

confidence: 82%

“…It was indicated that the energy shift of the IE peak, which corresponds to Δ excitation, could be a good probe to study the nuclear medium effects by Udagawa et al [1]. Systematic measurements performed at Saclay [2] have revealed behaviours of IE peaks found in longitudinal momentum (P L ) distributions of reaction products, produced from relativistic heavy ions (up to 40 Ar).…”

Section: Introductionmentioning

confidence: 99%

“…Systematic measurements performed at Saclay [2] have revealed behaviours of IE peaks found in longitudinal momentum (P L ) distributions of reaction products, produced from relativistic heavy ions (up to 40 Ar). The energy shift of the IE peak contains various contributions to be studied [1] and depends on incident energy as well as on reaction system. For instance, the IE peak was observed in the reaction 12 C( 3 He, t) at the incident energy down to 500 MeV/u [3].…”

Section: Introductionmentioning

confidence: 99%

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Inelastic process observed in charge-exchange reactions of⁵⁶Fe at 500 MeV/u

Momota

Yamaguchi

Suzuki

et al. 2014

EPJ Web of Conferences

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Abstract. The inelastic (IE) component of the reaction product, which is produced through charge-exchange reactions at relativistic energies of E ~ 1 GeV/u, is one of the hopeful probes used to study the nuclear medium effect on Δ excitation. In the present study, the longitudinal-momentum (P L ) distribution of 56 Co, produced by bombarding Cand CH 2 -target with a primary beam of 56 Fe at E=500 MeV/u, was observed by means of the spectrometer at HIMAC facility. The IE peak of 56 Co, produced from H and C targets, was successfully observed in energy transfer spectrum. The behaviors of the IE peaks are consistent with those observed in previous experiments. A remarkable reduction of the energy transfer for the IE process was also observed with C target compared with H target. The present results have shown the feasibility to investigate the energy transfer in chargeexchange reactions for heavy reaction system at the energy down to 500 MeV/u.

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Section: -P2supporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Inelastic process observed in charge-exchange reactions of⁵⁶Fe at 500 MeV/u

Momota

Yamaguchi

Suzuki

et al. 2014

EPJ Web of Conferences

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“…The measured experimental ratio of momentum tail and symmetric momentum distribution of 54 Fe is ≈ 7-10%, in qualitative agreement with the above estimates. The average energy removed by the pion from the nucleus is around 300 MeV [6,30,35]. This value is in agreement with the measured energy loss of the fragment (see the secondary horizontal axis on Fig.…”

supporting

confidence: 88%

Role of the Δ Resonance in the Population of a Four-Nucleon State in the Fe56→
Podolyák¹,
Shand²,
Lalović³
et al. 2016
Phys. Rev. Lett.
6
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4
0
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The 54 Fe nucleus was populated from a 56 Fe beam impinging on a Be target with an energy of E/A=500 M eV. The internal decay via γ-ray emission of the 10 + metastable state was observed. As the structure of this isomeric state has to involve at least four unpaired nucleons, it cannot be populated in a simple two-neutron removal reaction from the 56 Fe ground state. The isomeric state was produced in the low-momentum/energy tail of the parallel momentum/energy distribution of 54 Fe, suggesting that it was populated via the decay of the ∆ 0 resonance into a proton. This process allows the population of four-nucleon states, such as the observed isomer. Therefore, it is concluded that the observation of this 10 + metastable state in 54 Fe is a consequence of the quark structure of the nucleons.

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“…The inclusive cross sections can be decomposed into partial cross sections corresponding to different physical processes [28,29,45], as classified in Table I. We obtain the decomposition of the strength function S π of Eq.…”

Section: The Decomposition Of the Inclusive Cross Sections Into Comentioning

confidence: 99%

ΣNNquasibound states inHe3(K−,
Harada
¹
,
Hirabayashi
²

2014
Phys. Rev. C
17
2
11
0
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We theoretically demonstrate the inclusive and semiexclusive spectra in the 3 He(K − , π ∓ ) reactions at 600 MeV/c (4• ) within a distorted-wave impulse approximation, using a coupled (2N − ) + (2N − ) model with a spreading potential. We present the possible existence of the NN quasibound state with J π = 1/2 + , T 1 near the threshold, predicted by a 2N − Y folding-model potential derived from YN g-matrices. The result shows that a signal of the 3 He quasibound state is clearly confirmed near the threshold in the π − spectrum, whereas a peak of the 3 n quasibound state is rather reduced in the π + spectrum owing to the interference effects caused by the 3 S 1 -1 S 0 admixture in the NN pair. The mechanism of production for these spectra and charge symmetry breaking effects are also discussed.

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Δ excitations in nuclei and their decay properties

Cited by 48 publications

References 48 publications

Inelastic process observed in charge-exchange reactions of⁵⁶Fe at 500 MeV/u

Inelastic process observed in charge-exchange reactions of⁵⁶Fe at 500 MeV/u

Role of the Δ Resonance in the Population of a Four-Nucleon State in the Fe56→
Podolyák¹,
Shand²,
Lalović³
et al. 2016
Phys. Rev. Lett.
6
0
4
0
View full text Add to dashboard Cite

ΣNNquasibound states inHe3(K−,
Harada
¹
,
Hirabayashi
²

2014
Phys. Rev. C
17
2
11
0
View full text Add to dashboard Cite

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Δ excitations in nuclei and their decay properties

Cited by 48 publications

References 48 publications

Inelastic process observed in charge-exchange reactions of56Fe at 500 MeV/u

Inelastic process observed in charge-exchange reactions of56Fe at 500 MeV/u

Role of the Δ Resonance in the Population of a Four-Nucleon State in the Fe56→Podolyák1, Shand2, Lalović3 et al. 2016Phys. Rev. Lett.6040View full textAdd to dashboardCite

ΣNNquasibound states inHe3(K−,Harada1, Hirabayashi2 2014Phys. Rev. C172110View full textAdd to dashboardCite

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Inelastic process observed in charge-exchange reactions of⁵⁶Fe at 500 MeV/u

Inelastic process observed in charge-exchange reactions of⁵⁶Fe at 500 MeV/u

Role of the Δ Resonance in the Population of a Four-Nucleon State in the Fe56→
Podolyák¹,
Shand²,
Lalović³
et al. 2016
Phys. Rev. Lett.
6
0
4
0
View full text Add to dashboard Cite

ΣNNquasibound states inHe3(K−,
Harada
¹
,
Hirabayashi
²

2014
Phys. Rev. C
17
2
11
0
View full text Add to dashboard Cite