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The synthesis of the so-called ρ nuclei, i.e. a certain class of proton rich nuclei that are heavier than iron, requires a special mechanism known as ρ process. This process consists of various nucleosynthetic scenaria. In some of them proton and alpha-capture reactions are strongly involved, p-process nucleosynthesis is assumed to occur in the Oxygen/Neon rich layers of type II supernovae during their explosion, ρ nuclei are typically 10-100 times less abundant than the corresponding more neutron-rich isotopes. The prediction of their abundances is one of the major puzzles of all models of p-process nucleosynthesis. Until now all these models are capable of reproducing these abundances within a factor of 3. However, they all fail in the case of the light ρ nuclei with A

The cross section of the 89Y(p,7)90Zr reaction was determined at Ep=l.4-4.8 MeV via angle-integrated measurements carried out by means of a 4π Nal summing detector as well as via angular distribution measurements using an array of 4 HPGe detectors with 100% relative efficiency. The resulting cross sections vary from 0.5 to 5 mb. Astrophysical S factors and reaction rates have also been derived. A good agreement between the experimental rates and and the predictions of statistical theory has been found.

In beam cross section measurements of the 78Se(p,7)79Br and 80Se(p,7)81Br reactions have been carried out at Ep=1.4-3.5 MeV, by using high efficiency HPGe detectors with BGO shields for Compton background suppression. A preliminary analysis yielded total cross sections ranging from 10 μb to 3 mb. By means of the statistical compound nucleus theory of Hauser-Feshbach cross sections have also been calculated. A comparison between experimental data and theoretical predictions is presented.

Cross section measurements of the proton capture reactions of the 86Sr, 87Sr and 88Sr isotopes were carried out at energies Ep=1.4-5 MeV. At Ep 3.5 MeV, the measurements were performed by means of one HPGe detector of 80% relative efficiency. For the 87Sr(p,7)88Y and 88Sr(p,7)89Y reactions total cross sections ranging from 0.5 μο-5 mb were found. The data analysis of the 86Sr(p,7)87Y reaction is in progress. Cross sections have also been calculated by means of the statistical model code MOST. A very good agreement between the experimental data and the theoretical predictions has been found.

Proton-capture reaction cross sections on the 86,87,88Sr isotopes have been determined at energies from 1.4 to 5 MeV by measuring γ-angular distributions at the 4 MV single-ended Dynamitron accelerator of the University of Stuttgart as well as at the 5 MV VdG Tandem accelerator of NCSR "Demokritos", Athens. In the former case an array of 4 HPGe detectors with relative efficiency εr≈100%, each shielded with BGO crystals, were used. In the case of the measurements carried out at "Demokritos" we used only one HPGe detector (εr≈80%) with no BGO shield. Cross sections ranging from 0.5 μb to 5 mb as well as the relevant S factors were obtained. The data were compared with statistical model calculations using the code MOST. In the calculations, various combinations of microscopic and phe- nomenological models of the nucleon-Nucleus Optical Model Potentials (OMP) and Nuclear Level Densities (NLD) were used and a good agreement between the data and theoretical predictions was found.

Proton-capture reaction cross sections of Se isotopes were determined in the 1-6 MeV energy range by means of γ-angular distribution measurements as well as via the activation technique. In this report we compare our first cross-section results with statistical model calculations performed using various microscopic and phenomenological approaches of Optical Model Potentials and Nuclear Level Densities.

This contribution reports on a systematic investigation of in-beam cross-section measurements of (α,γ) reactions, carried out using a 4π calorimeter. The results are compared to the predictions of the Hauser-Feshbach (HF) theory. This com­ parison puts some constraints on the relevant nuclear properties entering the HF calculations.

Systematic experimental and theoretical investigations of the 72,73Ge(n,p)72,73 Ga and 72,74Ge(n,α)69,71Znm reaction cross sections are presented in the energy range from thresh- old to about 17 MeV neutron energy. The above reaction cross sections were measured from 8.8 to 11.4 MeV by using the activation method, relative to the 27Al(n,α)24Na refer- ence reaction. The quasi-monoenergetic neutron beams were produced via the 2H(d,n)3He reaction at the 5 MV VdG Tandem T11/25 accelerator of NCSR “Demokritos”. Statisti- cal model calculations using the code EMPIRE-II (version 2.19) taking into consideration pre-equilibrium emission were performed on the data measured in this work as well as on data reported in literature.

The proton capture reaction cross sections on 116Sn and 118Sn have been determined at astrophysically relevant energies by means of activation, 7-ray angular distribution and angle-integrated 7-flux measurements. The results of the present work together with those obtained in previous measurements are compared to the predictions of the Hauser-Feshbach theory.

Cross section measurements of deuteron-induced reactions on Ni and Ge isotopes have been carried out at energies well below the Coulomb barrier. The preliminary results are compared with statistical model calculations

The evaluated spectroscopic data are presented for 12 known nuclides of mass 215 (Hg, Tl, Pb, Bi, Po, At, Rn, Fr, Ra, Ac, Th, Pa). For 215 Hg, 215 Tl, 215 Pb, and 215 Pa nuclei, no excited states are known. The decay characteristics of 215 Hg and 215 Tl are unknown. The decay scheme of 215 Pb is considered as incomplete. Ordering of γ cascades in the decay of 36.9–s isomer of 215 Bi and for high–spin states above 2251 keV in 215 Fr are not established. High–spin excitations, including several isomeric states, are well known in 215 Bi, 215 Po, 215 Rn, 215 Fr, 215 Ra, and 215 Ac. No particle–transfer reaction data are available for any of the A=215 nuclei. The rms charge radii for 215 Pb, 215 Bi, 215 Po, 215 Rn, 215 Fr and 215 Ra have been evaluated by Daniel Abriola, from extrapolation or interpolation of available evaluated data in 2013An02 for radii of respective Z chains using formula 9 in 2004An14. This evaluation was carried out as part of ENSDD–workshop at VECC, Kolkata for Nuclear Structure and Decay Data, organized and hosted by VECC and Board of Research in Nuclear Sciences (BRNS) in Kolkata, India, November 26–29, 2012. This work supersedes the previous A = 215 evaluation (2001Br31) published by E. Browne which covered literature prior to May 2001.

The neutron-induced fission cross section of Np237 was experimentally determined at the high-resolution and high-intensity facility n-TOF, at CERN, in the energy range 100 keV to 9 MeV, using the U235(n,f) and U238(n,f) cross section standards below and above 2 MeV, respectively. A fast ionization chamber was used in order to detect the fission fragments from the reactions and the targets were characterized as far as their mass and homogeneity are concerned by means of α spectroscopy and Rutherford backscattering spectroscopy respectively. Theoretical calculations within the Hauser-Feshbach formalism have been performed, employing the empire code, and the model parameters were tuned in order to successfully reproduce the experimental fission cross-sectional data and simultaneously all the competing reaction channels.

We present the results of the analysis of the multi-dimensional potential energy surfaces obtained with a Skyrme-Hartree-Fock-Bogoliubov method. Static fission paths are determined using the method of steepest descent and are further analysed to give the heights and widths of the respective fission barriers. Spontaneous fission half-lives and neutron-induced fission cross sections are then calculated and compared with existing experimental data in the actinide region.

Unbound 1p1h states are excited together with the bound ones in one-step direct processes induced by nucleons of energy greater than the particle binding energy. The cross-sections of the one-step direct reactions to bound final states are folded into a convolution integral to obtain the multistep cross-sections. This is done in the framework of the theory of Feshbach, Kerman and Koonin (FKK) that describes the emission of one particle. The processes to unbound 1p1h final states give rise to more complicated direct reactions, that are evaluated by an approximate method. The comparison of the theory with inclusive proton inelastic scattering by iron and with the charge exchange (p,n) reaction on zirconium is revised, at energies from 25 MeV to 120 MeV. It is shown that in the case of the (p,n) reaction the theory of FKK does not account for approximately 35% of the direct processes.

The prompt γ‐ray emission related with the dynamical dipole mode decay was investigated in the 192Pb mass region by means of the 40Ca+152Sm and 48Ca+144Sm fusion‐evaporation and fission reactions at Elab = 11 and 10.1 MeV/nucleon, respectively. The two reactions populate, through entrance channel having different charge asymmetries, the 192Pb compound nucleus at an excitation energy of 236 MeV with identical spin distribution. Preliminary results of this experiment show that the dynamical dipole mode survives in collisions involving heavier mass reaction partners than those studied previously. As a fast cooling mechanism on the fusion path, the prompt dipole γ radiation could be of interest for the synthesis of super‐heavy elements through “hot” fusion reactions.

A systematic investigation of (p,γ) cross sections of nuclei from Se to Sb is presented. In-beam cross section measurements were carried out at E p = 1.4–5 MeV by using an array of 4 HPGe detectors of 100% relative efficiency shielded with BGO crystals. The S factors obtained are compared with the predictions of the statistical model code MOST.

Inelastic scattering and charge-exchange reactions have been analysed at energies ranging from 14 to 27 MeV using the modified multistep direct reaction theory (MSD) of Feshbach, Kerman and Koonin.1) The modified theory considers the non-DWBA matrix elements in the MSD cross section formulae and includes both incoherent particle- hole excitations and coherent collective excitations in the continuum, according to the prescription of. 2,3) The results show important contributions from multistep processes at all energies considered.

The neutron-induced fission cross section of U234 has been measured at the CERN n-TOF facility relative to the standard fission cross section of U235 from 20 keV to 1.4 MeV and of U238 from 1.4 to 200 MeV. A fast ionization chamber (FIC) was used as a fission fragment detector with a detection efficiency of no less than 97%. The high instantaneous flux and the low background characterizing the n-TOF facility resulted in wide-energy-range data (0.02 to 200 MeV), with high energy resolution, high statistics, and systematic uncertainties bellow 3%. Previous investigations around the energy of the fission threshold revealed structures attributed to β-vibrational levels, which have been confirmed by the present measurements. Theoretical calculations have been performed, employing the talys code with model parameters tuned to fairly reproduce the experimental data. © 2014 American Physical Society.

New nuclear level densities based on the microscopic statistical model are proposed for practical applications. The statistical calculations are performed using the deformed Hartree–Fock–BCS predictions of the ground-state structure properties. The microscopic model includes a consistent treatment of the shell effects, pairing correlations, deformation effects and collective excitations. It predicts the experimental neutron resonance spacings with a degree of accuracy comparable to that of the phenomenological back-shifted Fermi-gas-type formulae. The microscopic level densities are renormalized to the existing experimental data, namely the s-wave neutron resonance spacings and the cumulative number of low-lying levels. Level densities for more than 8000 nuclei are made available in a table format for practical applications.

We propose a new global α-nucleus optical model potential that takes into account the strong energy dependence and nuclear structure effects that characterize the alpha-nucleus interaction. The potential consists of a double-folded real part and a Woods-Saxon imaginary part with a Fermi-type energy dependence. The influence of purely volume absorption, volume plus surface absorption, as well as the dispersive relation is investigated. Three potentials are considered that are able to reproduce the bulk of existing experimental data at low energies. The need for more experimental data in the mass region A ⋍ 100 and A ⋍ 200 is stressed.

As a continuation of a systematic study of reactions relevant to astrophysical p-process, the (p, gamma) or (p, n) cross sections of three Se isotopes have been measured using all activation technique in the proton energy range between 1.3 and 3.6 MeV. The resulting cross sections of the Se-74,Se-76(p, gamma)Br-75,Br-77 and Se-82(p, n)Br-82 reaction have been compared with the predictions of Hauser-Feshbach statistical model calculations rising the NON-SMOKER, and MOST codes. In all three cases the theory is in satisfactory agreement with the measurements.

Cross sections for the ${}^{174}$Hf($n,2n$)${}^{173}$Hf and ${}^{176}$Hf($n,\phantom{\rule{-0.16em}{0ex}}2n$)${}^{175}$Hf reactions have been measured on the 5.5-MV Van de Graaff tandem accelerator of National Centre for Scientific Research ``Demokritos'' in Athens, in the neutron energy region from 8.8 to 11.0 MeV, using the activation technique. An experimental method to account for the contamination of the ${}^{176}$Hf($n,\phantom{\rule{-0.16em}{0ex}}2n$) reaction by the ${}^{174}$Hf($n,\phantom{\rule{-0.16em}{0ex}}\ensuremath{\gamma}$) reaction activated by the parasitic neutrons of the beam is presented. Statistical model calculations have also been performed using the nuclear-reaction codes empire-ii and talys. The results and effects of the nuclear input parameters as well as pre-equilibrium emission are discussed in detail.

International audience; The abundance calculations of the p-nuclei produced in explosive stellar sites rely on the Hauser-Feshbach (HF) theory with the alpha-article optical model potential (α-OMP) one of its major ingredients. To date, most of the (α, γ) cross sections measured show that HF calculations can be wrong by a factor of ten or more especially when phenomenological α-OMP are employed. To investigate the relevant uncertainties entering the HF calculations and furthermore develop global microscopic α-OMPs, systematic (α, γ) cross-section measurements are necessary. This led us to perform a feasibility study of (α, γ) measurements in inverse kinematics that will allow us to employ also radioactive beams in the future. Hence, the 4He(78Kr,γ)82Sr reaction was studied using the LISE3 spectrometer to separate the 82Sr recoils from the primary 78Kr beam. Although an excellent rejection factor > 1010 was achieved, the position of the ions of interest was unexpectedly masked by a secondary beam of high intensity. Given these, new setup improvements are proposed to remove the pollutant ions. Recently, many experiments were conducted in order to study the influence of the environment (especially in a metallic material) on the decay probability of radioactive nuclei. Additionally, hydrogen-like fusion reactions were performed indicating a change in the cross-section due to the influence of the Coulomb field screening induced by quasi-free electrons in metals. This was explained by the Debye screening model which treats metallic electrons within Maxwell-Boltzmann statistics. We measured the decay rate of 19O in metallic, insulating and superconducting environments whereas the electrons in the superconductors should obey the Bose-Einstein statistics. The decay rate measurement was supported by a branching ratios measurement. We found that the effect on the decay rate, if any, is less than the 0.1%, far below the theoretical predictions.

Comunicación presentada al: "Frontiers in nuclear structure, astrophysics, and reactions: Finustar 3" celebrado del 23 al 27 de agosto del 2010 en Grecia.-- et al., In this contribution, results of experiments performed with the three Beryllium isotopes 9,10,11Be on a medium mass 64Zn target, at a center of mass energy of ≈1.4 the Coulomb barrier, will be discussed. Elastic scattering angular distributions have been measured for the 9,10Be reactions. In the 11Be case the quasielastic scattering angular distribution was obtained. In the halo nucleus case, the angular distribution exhibit a non-Fresnel-type pattern with a strong damping of the Coulomb-nuclear interference peak. Moreover, it is found that the total reaction cross-section for the halo nucleus induced collision is more than double the ones extracted in the collisions induced by the non-halo Beryllium isotopes. A large contribution to the total-reaction cross-section in the 11Be case could be attributed to transfer and/or break-up events.

The mean lifetime of the 21+ state in the near drip‐line nuclide 20C was measured for the first time using the Recoil Distance Method with intermediate energy radioactive beams via a knockout reaction. The measured value of τ21+ = 9.8±2.8(stat)−1.1+0.5(syst) ps gives a reduced transition probability of B(E2;21+→0g.s.+) = 7.51.7+3.0(stat) e2fm4. This value is in good agreement with shell model calculations using a p—sd shell model space and isospin‐dependent (N—Z) effective charges.

The combinatorial model of nuclear level densities has now reached a level of accuracy comparable to that of the best global analytical expressions. We have recently improved the treatment using simultaneously the single particle levels and collective properties predicted by the newly derived D1M Gogny interaction. In addition for deformed nuclei, the transition to sphericity is coherently taken into account on the basis of a temperature‐dependent Hartree‐Fock calculation which provides at each temperature the structure properties needed to build the level densities. This new method is described and shown to give good results with respect to available experimental data.

The physics of intrinsic states, within the pairing gap of deformed nuclei with N∼90 neutrons, is discussed in the light of the recent realization that the first excited 02+ states in these nuclei are not β‐vibrations but four quasi‐neutron states. The properties of γ‐vibration Kπ = 2+ bands is discussed. A method of measuring two proton transfer in high resolution using the (3He,n) reaction is proposed.

The γ‐ray strength function (γSF) interconnects radiative neutron capture and photoneutron emission as a common ingredient in the statistical model. Outlined here is an indirect method of determining radiative neutron‐capture cross sections for unstable nuclei based on the γ‐ray strength function. Application examples of the γSF method are demonstrated.

The nuclear γ‐ray strength function is one of the indispensable inputs needed for reaction‐rate calculations, and is particularly important for the neutron‐capture cross section. The nuclear physics group at the Oslo Cyclotron Laboratory has developed a method to extract simultaneously nuclear level density and γ‐ray strength function from particle‐γ coincidence measurements. Data on the strength functions of Sn nuclei as well as for lighter elements are presented. The Sn isotopes all display a resonance‐like structure close to the neutron threshold, that could possibly be due to the neutron‐skin oscillation mode. This so‐called pygmy dipole resonance greatly influences the neutron‐capture rates. In the lighter nuclei, an enhancement of the strength function at low γ energies is observed. The possible impact of this increase on Maxwellian‐averaged reaction rates has been investigated.

α formation amplitudes extracted from experimental data are presented and an abrupt change around the N = 126 shell closure is noted. It is explained as a sudden hindrance of the clustering of nucleons. The clustering induced by the pairing mode acting upon the four nucleons is inhibited if the configuration space does not allow a proper manifestation of the pairing collectivity.

We have studied the dynamical effects of the halo structure of 11Li on the scattering on heavy targets at energies around the Coulomb barrier. This experiment was performed at ISAC‐II at TRIUMF with a world record in production of the post‐accelerated 11Li beam. As part of this study we report here on the first measurement of the elastic cross section of the core nucleus, i.e. 9Li on 208Pb, at energies around the Coulomb barrier. A preliminary optical model analysis has been performed in order to extract a global optical potential to describe the measured angular distributions. © 2011 American Institute of Physics

During an experiment at Jyvaskyla laboratory involving a 27 MeV α beam on a thick 154Sm target, γ‐spectroscopy of 156Gd was performed using JUROGAM HPGe multidetector array. We will present here experimental results concerning positive parity bands of this nucleus. Level scheme was enriched with more than ten new transitions as well as a new level in a band observed recently.

The excitation functions and isomeric cross section ratios of Tl isotopes obtained at irradiation of 197Au by a 6He‐ions beams with energies from 15 to 60 MeV are analyzed. The EMPIRE‐2.18 code which takes into account the branching ratios of gamma‐transitions of discrete gamma‐cascade in a residual nucleus in the calculations of the cross sections of the isomeric and ground nuclear states production is used.

Laser spectroscopy experiments at the ISOLDE facility have a venerable history which now spans more than 30 years. This period has seen the development of a remarkable variety of laser techniques in order to study rare isotopes far from stability, which include in‐source, collinear and β‐NMR/β‐NQR spectroscopy. The propensity for innovation in laser spectroscopy at ISOLDE has continued in the last three years, helped in part by synergies with laboratories across Europe. Highlights of this work include bunched‐beam spectroscopy of the neutron‐rich copper and gallium isotope chains and collinear‐anticollinear spectroscopy of the Be isotope chain. New ionization schemes have been developed for the Po atom crucial for the successful in‐source laser spectroscopy campaign. The future HIE‐ISOLDE facility will provide experimentalists with improved ion‐beam quality, increased yields and a larger number of accessible elements. Several new experiments are now in preparation to maximise the reach of laser spectrosco...

Staggering in the B(M1) intra and inter‐band transition probabilities may be a result of effects other than strongly broken chirality. Thus it is risky to consider it an unambiguous prove for chiral symmetry.

Gamow‐Teller (GT) transitions are mediated by the στ operator. Owing to its simplicity and also its spin‐isospin nature, GT transitions play key roles in the studies of nuclear structure as well as astro‐nuclear processes. In violent neutrino‐induced reactions at the core‐collapse stage of type II supernovae, Gamow‐Teller (GT) transitions starting from stable as well as unstable pf‐shell nuclei play important roles. We study GT transitions starting from 47Ti in a high‐resolution (3He,t) charge‐exchange reactions at 0° and at an intermediate incident energy of 140 MeV/nucleon at Research Center for Nuclear Physics (RCNP), Osaka. Individual GT transitions up to high excitations were observed. Assuming the isospin symmetry for the strengths of Tz = ±3/2→±1/2 analogous GT transitions, we can deduce the detailed strength distribution starting from mirror unstable nucleus 47Mn.

In recent years investigations have been made to study the electric Pygmy Dipole Resonance (PDR) systematically, mainly in semi‐magic nuclei. For this purpose the well understood high resolution (γ,γ′) photon scattering method is used. In complementary (α,α′γ) coincidence experiments at Eα = 136 MeV a similar γ‐energy resolution and a high selectivity to E1 transitions can be obtained at the Big‐Bite Spectrometer (BBS) at KVI, Groningen. In comparison to the (γ,γ′) method a structural splitting of the PDR is observed in the N = 82 nuclei 138Ba and 140Ce and in the Z = 50 nucleus 124Sn. The low energy part is excited in (γ,γ′) as well as in (α,α′γ) while the high energy part is observed in (γ,γ′) only. The experimental results together with theoretical QPM and RQTBA calculations on 124Sn which are able to reproduce the splitting of the PDR qualitatively are presented. The low‐lying group of Jπ = 1− states seem to represent the more isoscalar neutron‐skin oscillation of the PDR while the energetically higher‐lying states seemingly belong to the transitional region between the PDR and the isovector Giant Dipole Resonance (IVGDR).

We propose to produce neutron‐rich nuclei in the range of the astrophysical r‐process around the waiting point N = 126 by fissioning a dense laser‐accelerated thorium ion bunch in a thorium target (covered by a CH2 layer), where the light fission fragments of the beam fuse with the light fission fragments of the target. Via the ‘hole‐boring’ mode of laser Radiation Pressure Acceleration using a high‐intensity, short pulse laser, very efficiently bunches of 232Th with solid‐state density can be generated from a Th target and a deuterated CD2 foil, both forming the production target assembly. Laser‐accelerated Th ions with about 7 MeV/u will pass through a thin CH2 layer placed in front of a thicker second Th foil (both forming the reaction target) closely behind the production target and disintegrate into light and heavy fission fragments. In addition, light ions (d,C) from the CD2 layer of the production target will be accelerated as well, inducing the fission process of 232Th also in the second Th layer. The laser‐accelerated ion bunches with solid‐state density, which are about 1014 times more dense than classically accelerated ion bunches, allow for a high probability that generated fission products can fuse again. The high ion beam density may lead to a strong collective modification of the stopping power, leading to significant range and thus yield enhancement. Using a high‐intensity laser as envisaged for the ELI‐Nuclear Physics project in Bucharest (ELI‐NP), order‐of‐magnitude estimates promise a fusion yield of about 103 ions per laser pulse in the mass range of A = 180–190, thus enabling to approach the r‐process waiting point at N = 126.

We calculate the neutrino scattering and absorption on the hot and dense neutron‐star matter with hyperons under the strong magnetic field using perturbative approach. We find that the absorption cross‐sections show the remarkable angular dependence: its strength is reduced in the direction parallel to the magnetic field and enhanced in the opposite direction. This variation becomes about 2.2 % when the magnetic field is about 2×1017 G.

The nature of the low-lying dipole states in neutron-rich nuclei, often associated to the Pygmy Dipole Resonance, has been investigated. This has been done by describing them within the Hartree-Fock plus RPA formalism. The analysis shows that they are not of collective nature although many particle-hole configurations participate to their formation. Taking advantage of their strong isospin mixing one can envisage combined reaction processes involving the Coulomb and different mixtures of isoscalar and isovector nuclear interactions in order to provide more hints to unveil the characteristic features of these states.

An exclusive study of 17F breakup reactions has been performed at the FRIBs facility of the Laboratori Nazionali del Sud in Catania (Italy). The experiment has been performed with the aim of testing the accuracy of the Coulomb‐breakup indirect technique used to infer radiative‐capture cross sections at low energies. This technique has been used in the 7Be(p,γ)8B case, but has never been tested. By measuring the breakup of 17F into 16O+p, and comparing the inferred cross section for 16O(p,γ)17F to direct precise measurements, the influence of E2 transitions and higher‐order effects, that are predicted to be significant in Coulomb‐breakup reactions, can be evaluated. The first results and preliminary model comparison are reported.

Examples are presented to illustrate the power of prompt γ‐ray spectroscopy of fission fragments from compound nuclei with A∼200 formed in fusion‐evaporation reactions in experiments using the Gammasphere Ge‐detector array. Complementary methods, such as Coulomb excitation and deep‐inelastic processes, are also discussed. In other cases (n,xnγ) reactions on stable isotopes have been used to establish neutron excitation functions for γ‐rays using a pulsed “white”‐neutron source, coupled to a high‐energy‐resolution germanium‐detector array. The excitation functions can unambiguously assign γ‐rays to a specific reaction product. Results from all these methods bridge the gaps in the systematics of high‐spin states between the neutron‐deficient and neutron‐rich nuclei. Results near shell closures should motivate new shell model calculations.

The ground state hyperfine structure and other properties are calculated for muonic helium atoms (3He+2μ−e− or 4He+2μ−e−) with the use of some local properties of the wave functions in the domains where two particles are close to each other or far away. Simple wave functions incorporating these properties with one variational parameter is developed. The calculated values for hyperfine structure, energy and average interparticle distances in ground state are compared with the correlation function hyper‐spherical harmonic method and multibox variational approach. The obtained results are very close to the values calculated by mentioned methods, giving strong indications that the proposed wave functions provide relatively accurate values.

International audience; The mass values of the neutron-deficient cadmium isotopes 99−109Cd and of the neutronrich isotopes 114,120,122−124,126,128Cd have been measured using ISOLTRAP. The behavior of the separation energies of the cadmium isotopes from N = 50 to 82 is discussed.

For coupled‐channel descriptions of low‐energy nucleon‐induced interactions involving nuclei with particle‐unstable exited states, it is necessary to include the widths of the target states. How those widths may affect the elastic scattering cross sections is examined within the framework of the Multi‐Channel Algebraic Scattering (MCAS) method.

The deep inelastic reaction (DIC) 48Ca+64Ni, at an energy approximately 2.5 times above the Coulomb barrier, was studied using the CLARA‐PRISMA setup at the Laboratori Nazionali di Legnaro. Total cross sections and angular distributions, both energy integrated and associated to the population of selected excited states, are measured for the most intense reaction channels. The γ‐decay of the most intense reaction products is also studied. The use of angular distributions and polarization measurements of γ transitions allows to firmly establish spin and parity of excited states. Both reaction and gamma spectroscopy studies demonstrate the relevance of DIC with heavy ions for the investigation of moderately neutron rich systems.

Isospin mixing induced by Coulomb interaction has been measured in the compound nucleus Z = N = 40 80Zr at T∼2 MeV produced in a fusion‐evaporation reaction. The observable sensitive to the isospin purity of the compound nucleus is the Giant Dipole Resonance γ decay. The degree of mixing of the compound nucleus has been obtained via Statistical Model analysis of the measured γ spectrum.