Coulomb dissociation reactions on Mo isotopes for astrophysics applications

Ershova, O.; Adrich, P.; Álvarez‐Pol, H.; Aksouh, F.; Aumann, T.; Babilon, M.; Behr, K.-H.; Benlliure, J.; Berg, T.; Boehmer, M.; Boretzky, K.; Bruenle, A.; Beyer, R.; Casarejos, E.; Chartier, M.; Cortina‐Gil, D.; Chatillon, A.; Pramanik, U. Datta; Deveaux, L.; Elvers, M.; Elze, T.W.; Emling, H.; Erhard, M.; Fernández–Domínguez, B.; Geißel, H.; Górska, M.; Heil, M.; Hellstroem, M.; Ickert, G.; Johansson, H.; Junghans, A. R.; Käppeler, F.; Kiselev, O.; Klimkiewicz, A.; Kratz, Jens Volker; Kulessa, R.; Kurz, N.; Labiche, M.; Bleis, T. Le; Lemmon, R. C.; Lindenberg, Kai; Litvinov, Yuri A.; Maierbeck, P.; Movsesyan, A.; Mueller, S.; Nilsson, T.; Nociforo, C.; Paar, Nils; Palit, R.; Paschalis, S.; Prokopowicz, W.; Reifarth, R.; Rossi, D.; Schnorrenberger, L.; Simon, H.; Klaus, S.; Surówka, G.; Vretenar, Dario; Wagner, Andreas; Walter, S.; Waluś, W.; Weick, H.; Winckler, N.; Winkler, M.; Zilges, A.

doi:10.22323/1.100.0232

Cited by 5 publications

(12 citation statements)

References 8 publications

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“…The results for the reactions 92 Mo(γ,n) and 100 Mo(γ,n) are in good agreement with measurements performed with real photons [5]. According to the method described in [10], the photoabsorption data available for the reaction 94 Mo(γ,n) 93 Mo from Beil et al [13] were converted to Coulomb excitation spectra for the E1 and E2 components using the systematics for Giant Quadrupole Resonances. The data are presented in Fig.…”

Section: Comparison To Results From Photoabsorption Measurementssupporting

confidence: 74%

“…The data were obtained by a convolution of the E1 and E2 photoabsorption cross sections with the corresponding calculated virtual photon field. The E2 component was determined from the systematics for Giant Quadrupole Resonances [10]. 100 Mo and the preliminary value for 94 Mo are in good agreement with experiments using real photons, thus validating the method of Coulomb Dissociation.…”

Section: Discussionsupporting

confidence: 67%

“…The aim of the present experiment was the validation of the method of Coulomb Dissociation by comparing the results with data from photoactivation measurements [4]. The (γ,n) cross section of the unstable isotope 93 Mo could be determined for the first time [5].…”

Section: 94mentioning

confidence: 98%

“…LAND/R 3 B experimental setup for the measurement of 92,93,94,100 Mo(γ,n) by Coulomb Dissociation[10].…”

mentioning

confidence: 99%

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Measurement of the^92,93,94,100Mo(γ,n) reactions by Coulomb Dissociation

Göbel

Adrich

Altstadt

et al. 2016

J. Phys.: Conf. Ser.

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The Coulomb Dissociation (CD) cross sections of the stable isotopes 92,94,100 Mo and of the unstable isotope 93 Mo were measured at the LAND/R 3 B setup at GSI Helmholtzzentrum für Schwerionenforschung in Darmstadt, Germany. Experimental data on these isotopes may help to explain the problem of the underproduction of 92,94 Mo and 96,98 Ru in the models of p-process nucleosynthesis. The CD cross sections obtained for the stable Mo isotopes are in good agreement with experiments performed with real photons, thus validating the method of Coulomb Dissociation. The result for the reaction 93 Mo(γ,n) is especially important since the corresponding cross section has not been measured before. A preliminary integral Coulomb Dissociation cross section of the 94 Mo(γ,n) reaction is presented. Further analysis will complete the experimental database for the (γ,n) production chain of the p-isotopes of molybdenum.

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Section: Comparison To Results From Photoabsorption Measurementssupporting

confidence: 74%

Section: Discussionsupporting

confidence: 67%

Section: 94mentioning

confidence: 98%

“…LAND/R 3 B experimental setup for the measurement of 92,93,94,100 Mo(γ,n) by Coulomb Dissociation[10].…”

mentioning

confidence: 99%

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Measurement of the^92,93,94,100Mo(γ,n) reactions by Coulomb Dissociation

Göbel

Adrich

Altstadt

et al. 2016

J. Phys.: Conf. Ser.

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“…Picture taken from Ref. [22]. with a detection system for the identification and tracking of the incoming isotopes impinging on a production target.…”

Section: Setup and Experimental Techniquementioning

confidence: 99%

Quasi-free neutron and proton knockout reactions on 57Ni

Movsesyan¹

2014

Proceedings of 52 International Winter Meeting on Nuclear Physics — PoS(Bormio2014)

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This work presents one of the several experiments at the R 3 BLAND setup (at GSI in Darmstadt, Germany), dedicated to investigations of nuclear structure with proton-induced quasi-free scattering reactions in inverse kinematics at relativistic energies. Kinematically complete measurements were undertaken, which allow for the analysis of (p,2p) and (p,pn) reactions. A similar technique with an upgraded setup will be used for the future R 3 B program at FAIR/GSI, for studies of the single-particle structure and the role of N-N correlations in very exotic nuclei. One-neutron (p,pn) and one-proton (p,2p) quasi-free knockout reactions on the 57 Ni nucleus are being analyzed within this work. Position, time-of-flight and energy-loss measurements of heavy ions and light particles before and after the target were undertaken. A clean identification of the quasi-free scattering reactions on a proton target can be achieved with the detector system around the target area, in combination with the exclusive identification of the reaction participants.

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Constraining the astrophysical origin of the p-nuclei through nuclear physics and meteoritic data

et al. 2013

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Abstract. A small number of naturally occurring, proton-rich nuclides (the p-nuclei) cannot be made in the s-and r-process. Their origin is not well understood. Massive stars can produce p-nuclei through photodisintegration of pre-existing intermediate and heavy nuclei. This so-called γ-process requires high stellar plasma temperatures and occurs mainly in explosive O/Ne burning during a core-collapse supernova. Although the γ-process in massive stars has been successful in producing a large range of p-nuclei, significant deficiences remain. An increasing number of processes and sites has been studied in recent years in search of viable alternatives replacing or supplementing the massive star models. A large number of unstable nuclei, however, with only theoretically predicted reaction rates are included in the reaction network and thus the nuclear input may also bear considerable uncertainties. The current status of astrophysical models, nuclear input, and observational constraints is reviewed. After an overview of currently discussed models, the focus is on the possibility to better constrain those models through different means. Meteoritic data not only provide the actual isotopic abundances of the p-nuclei but can also put constraints on the possible contribution of proton-rich nucleosynthesis. The main part of the review focusses on the nuclear uncertainties involved in the determination of the astrophysical reaction rates required for the extended reaction networks used in nucleosynthesis studies. Experimental approaches are discussed together with their necessary connection to theory, which is especially pronounced for reactions with intermediate and heavy nuclei in explosive nuclear burning, even close to stability.

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Coulomb dissociation reactions on Mo isotopes for astrophysics applications

Cited by 5 publications

References 8 publications

Measurement of the^92,93,94,100Mo(γ,n) reactions by Coulomb Dissociation

Measurement of the^92,93,94,100Mo(γ,n) reactions by Coulomb Dissociation

Quasi-free neutron and proton knockout reactions on 57Ni

Constraining the astrophysical origin of the p-nuclei through nuclear physics and meteoritic data

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Coulomb dissociation reactions on Mo isotopes for astrophysics applications

Cited by 5 publications

References 8 publications

Measurement of the92,93,94,100Mo(γ,n) reactions by Coulomb Dissociation

Measurement of the92,93,94,100Mo(γ,n) reactions by Coulomb Dissociation

Quasi-free neutron and proton knockout reactions on 57Ni

Constraining the astrophysical origin of the p-nuclei through nuclear physics and meteoritic data

Contact Info

Product

Resources

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Measurement of the^92,93,94,100Mo(γ,n) reactions by Coulomb Dissociation

Measurement of the^92,93,94,100Mo(γ,n) reactions by Coulomb Dissociation