The <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:mi>T</mml:mi><mml:mo>=</mml:mo><mml:mn>2</mml:mn></mml:math> mirrors 36Ca and 36S: A test for isospin symmetry of shell gaps at the driplines

Doornenbal, P.; Reiter, P.; Grawe, H.; Otsuka, Takaharu; Al-Khatib, A.; Banu, A.; Beck, T.; Becker, F.; Bednarczyk, P.; Bracco, A.; Bürger, A.; Cáceres, L.; Camera, F.; Chmel, S.; Crespi, F. C. L.; Geißel, H.; Gerl, J.; Górska, M.; Grȩbosz, J.; Hübel, H.; Kavatsyuk, M.; Kavatsyuk, O.; Kmiecik, M.; Kojouharov, I.; Kurz, N.; Lozeva, R.; Maj, A.; Mandal, S.; Męczyński, W.; Million, B.; Podolyák, Zs.; Richard, A.; Saito, N.; Saito, T.; Schaffner, H.; Seidlitz, M.; Striepling, T.; Utsuno, Yutaka; Walker, Joel W.; Warr, N.; Weick, H.; Wieland, O.; Winkler, M.; Wollersheim, H. J.

doi:10.1016/j.physletb.2007.02.001

Cited by 36 publications

(14 citation statements)

References 34 publications

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“…The energy of the 2 + state in 36 Ca was determined to be E(2 + ) = 3036 (11) includes the calibration and the peak fit uncertainties. The excitation energy obtained in this experiment is in agreement with the value of E(2 + ) = 3015 (16) keV measured at GSI [15]. Figure 2 includes a simulation of the emission of a single γ ray of 3036 keV from 36 Ca.…”

Section: Resultssupporting

confidence: 85%

“…Theoretical spectroscopic factors C 2 S th were calculated with the code ANTOINE [24,25] by taking the USD interaction [26]. When using the modified interactions USDm and USDm 2 described in [15], where the single-particle energies are directly taken from excited states in the mirror nuclei 17 O and 17 F to reproduce explicitly the mirror energy differences in 36 Ca-36 S and 32 Ar-32 Si, respectively, or otherwise the updated USDB interaction [27], the calculated spectroscopic factors vary from 0.91 to 0.94 for the ground state and from 1.10 to 1.16 for the excited state, the USD values being in the middle with 0.92 and 1.13.…”

Section: Discussionmentioning

confidence: 99%

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Cross sections for one-neutron knock-out from37Ca at intermediate energy

Bürger¹,

Azaiez²,

Algora³

et al. 2012

Phys. Rev. C

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The cross section for the knock-out of a deeply bound valence neutron from 37 Ca at an incident beam energy of 60A MeV has been measured along with momentum distributions of the residual nuclei and γ rays from the de-excitation of the first excited state in 36 Ca. As for other cases of deeply bound nucleons studied using knock-out reactions, the reduction of the measured cross section compared to theoretical predictions is stronger than those observed for near-magic stable nuclei. Both the momentum distributions and the excitation energy of the first excited state in 36 Ca indicate a sizable N = 16 gap.

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Section: Resultssupporting

confidence: 85%

Section: Discussionmentioning

confidence: 99%

Cross sections for one-neutron knock-out from37Ca at intermediate energy

Bürger¹,

Azaiez²,

Algora³

et al. 2012

Phys. Rev. C

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“…Since then, the excitation energy of the 2 + first-excited state in 36 Ca was measured at GANIL [12], GSI [13] and NSCL [14] by means of one-neutron knockout reactions from a 37 Ca secondary beam. Taking the most precise measurement, its energy is found to be 3045.0 ± 2.4 keV [14].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the K35(p,γ)Ca36 reaction rate using the
Lalanne¹,
Sorlin²,
Assié³
et al. 2021
Phys. Rev. C
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Background: A recent sensitivity study has shown that the 35 K(p, γ) 36 Ca reaction is one of the ten (p, γ) reaction rates that could significantly impact the shape of the calculated X-ray burst light curve. Its reaction rate used up to now in type I X-ray burst calculations was estimated using an old measurement for the mass of 36 Ca and theoretical predictions for the partial decay widths of the first 2 + resonance with arbitrary uncertainties.Purpose: In this work, we propose to reinvestigate the 35 K(p, γ) 36 Ca reaction rate, as well as related uncertainties, by determining the energies and decay branching ratios of 36 Ca levels, within the Gamow window of X-ray burst, in the 0.5 to 2 GK temperature range.Method: These properties were studied by means of the one neutron pick-up transfer reaction 37 Ca(p, d) 36 Ca in inverse kinematics using a radioactive beam of 37 Ca at 48 MeV nucleon −1 . The experiment was performed at the GANIL facility using the liquid Hydrogen target CRYPTA, the MUST2 charged particle detector array for the detection of the light charged particles and a zero degree detection system for the outgoing heavy recoil nuclei. Results:The atomic mass of 36 Ca is confirmed and new resonances have been proposed together with their proton decay branching ratios. This spectroscopic information, used in combination with very recent theoretical predictions for the γ-decay width, were used to calculate the 35 K(p, γ) 36 Ca reaction rate. The recommended rate of the present work was obtain within a uncertainty factor of 2 at 1 sigma. This is consistent, with the previous estimate in the X-ray burst temperature range. A large increase of the reaction rate was found at higher temperatures due to two newly discovered resonances. Conclusions:The 35 K(p, γ) 36 Ca thermonuclear reaction rate is now well constrained by the present work in a broad range of temperatures covering those relevant to type I X-ray bursts. Our results show that the 35 K(p, γ) 36 Ca reaction does not affect the shape of the X-ray burst light curve, and that it can be removed from the list of the few influential proton radiative captures reactions having a strong impact on the light curve.

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“…Given the above, it seems opportune to comment already that the mirror energy difference (MED) of the 1/2 − arising from the mirror symmetry violation can be as low as ∼30 keV. Note that MEDs as large as 300 keV have been measured for the 2 + states of the 36 Ca-36 S mirror pair, which can be understood without invoking threshold effects [4]. Even further, in the same mirror pair, a prediction of a huge MED of 700 keV for the first excited 0 + states has been made in Ref.…”

mentioning

confidence: 99%

Isospin symmetry breaking in the mirror pair Sr73−Br73

2020

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The T=2 mirrors 36Ca and 36S: A test for isospin symmetry of shell gaps at the driplines

Cited by 36 publications

References 34 publications

Cross sections for one-neutron knock-out from37Ca at intermediate energy

Cross sections for one-neutron knock-out from37Ca at intermediate energy

Evaluation of the K35(p,γ)Ca36 reaction rate using the
Lalanne¹,
Sorlin²,
Assié³
et al. 2021
Phys. Rev. C
Self Cite

Isospin symmetry breaking in the mirror pair Sr73−Br73

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The T=2 mirrors 36Ca and 36S: A test for isospin symmetry of shell gaps at the driplines

Cited by 36 publications

References 34 publications

Cross sections for one-neutron knock-out from37Ca at intermediate energy

Cross sections for one-neutron knock-out from37Ca at intermediate energy

Evaluation of the K35(p,γ)Ca36 reaction rate using the Lalanne1, Sorlin2, Assié3 et al. 2021Phys. Rev. CSelf Cite

Isospin symmetry breaking in the mirror pair Sr73−Br73

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Product

Resources

About

Evaluation of the K35(p,γ)Ca36 reaction rate using the
Lalanne¹,
Sorlin²,
Assié³
et al. 2021
Phys. Rev. C
Self Cite