Identification of the proton drip line

Alkhazov, G.; Mezilev, K. A.; Novikov, Yu. N.; Nurmukhamedov, A. M.; Ganbaatar, N.; Gromov, K.Ya.; Kalinnikov, V. G.; Potempa, A.; Tárkányi, F.

doi:10.1007/bf01415110

Cited by 40 publications

(11 citation statements)

References 5 publications

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“…The new value reported recently by the Munich group [19], is nearly identical to their previous result [15], and similarly, our values are internally agreeing. Meanwhile, additional information is also available from /?+-endpoint measurements [36,38]. These measurements and also the new Atomic Mass Evaluation [35] are in excellent agreement with the decay energy given here (compare Table 5).…”

Section: Comparison With Other Datasupporting

confidence: 76%

“…These measurements and also the new Atomic Mass Evaluation [35] are in excellent agreement with the decay energy given here (compare Table 5). In the course of /~+-endpoint studies with Ge detectors [36,38,39] decay energies were also published for 148'~Tb and ls~ and they are listed here for comparison in Table5. The fl+-endpoint energies yield systematically larger decay energies than derived by us from measurements of EC/~ + intensity ratios.…”

Section: Comparison With Other Datamentioning

confidence: 99%

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Atomic masses of147m, 148m, 149m Tb,148Dy,150m, 152m Ho derived from decay properties

et al. 1985

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Section: Comparison With Other Datasupporting

confidence: 76%

Section: Comparison With Other Datamentioning

confidence: 99%

Atomic masses of147m, 148m, 149m Tb,148Dy,150m, 152m Ho derived from decay properties

et al. 1985

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“…From X-7 coincidence data and mass-separation, those lines were found to be associated to the decay of 137Sm. The list of 7-rays is in good agreement with a preliminary study performed at the IRIS separator [7] although some intensity discrepancies should be noted. Our y-y coincidences allow to establish a tentative ]?-decay scheme to the t3Vpm (Fig.…”

Section: Eu~ 137smsupporting

confidence: 60%

“…Moreover, with mass separated samples, Alkhazov et al [7] have studied nuclei with 136<A< 154, situated closer to the stability valley and in particular the A= 137 mass chain. Some lighter/~-delayed proton emitters ranging from A= 125 to A= 143 have also been recently reported by Nitschke et al [-8, 9] using 92Mo, 9~ 54Fe, 5~ targets and 92Mo, 58Ni, 56Fe, 4~ beams.…”

Section: Introductionmentioning

confidence: 98%

New exotic neutron-deficient nuclei nearN=82

Redon

Ollivier

Béraud

et al. 1986

Z. Physik A - Atomic Nuclei

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“…A dependence of the pairing strength on the neutron excess was suggested in [7]. It was later observed from the mass determination of exotic Dy-Hg isotopes that ∆ p and possibly ∆ n increase towards the proton drip-line [8].…”

mentioning

confidence: 99%

Isospin Dependence in the Odd-Even Staggering of Nuclear Binding Energies

Litvinov¹,

Bürvenich²,

Geißel³

et al. 2005

Phys. Rev. Lett.

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The FRS-ESR facility at GSI provides unique conditions for precision measurements of large areas on the nuclear mass surface in a single experiment. Values for masses of 604 neutron-deficient nuclides (30≤Z≤92) were obtained with a typical uncertainty of 30 µu. The masses of 114 nuclides were determined for the first time. The odd-even staggering (OES) of nuclear masses was systematically investigated for isotopic chains between the proton shell closures at Z=50 and Z=82. The results were compared with predictions of modern nuclear models. The comparison revealed that the measured trend of OES is not reproduced by the theories fitted to masses only. The spectral pairing gaps extracted from models adjusted to both masses and density related observables of nuclei agree better with the experimental data.Significant progress has been achieved over the last years in constructing self-consistent mass models [1,2]. These models aim to reliably describe the properties of nuclei far off the valley of β-stability, where the experimental information is scarce or even not available yet. For instance, in modelling the astrophysical r-process of nuclear synthesis one needs precise knowledge of masses and half-lives of very exotic nuclei and one has to rely on theoretical predictions since most of the nuclides involved have not even been produced in the laboratory yet. The predictions for these nuclides dramatically deviate for the different models [2]. Thus new experimental data on exotic nuclei and consequently better understanding of nuclear structure away from the valley of β-stability is essential for further theoretical development.Odd-even staggering of nuclear binding energies (OES) was detected in the early days of nuclear physics [3] and was explained by the presence of pairing correlations between nucleons in the nucleus [4]. Pairing contributes only little to the total nuclear binding energy but its influence on the nuclear structure is significant.The common way to extract experimental information about the pairing correlations is to measure the value of the OES which approximates the pairing-gap energy (∆) in the standard Bardeen-Cooper-Schrieffer (BCS) theory [5]. The latter quantity is connected with the * Physical Review Letters 95 (2005) 042501, http://prl.aps.org/ strength of the pairing interaction (G):where ε ν is the single-particle energy and λ is the chemical potential. The summation goes over all single-particle levels ν below and above the Fermi energy. In order to evaluate this sum in local pairing functionals a (smooth) cut-off in energy is usually implemented. Neutron (∆ n ) and proton (∆ p ) pairing gaps are usually determined from finite-difference equations of measured masses [6], e.g. by the five-point formulae:

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Identification of the proton drip line

Cited by 40 publications

References 5 publications

Atomic masses of147m, 148m, 149m Tb,148Dy,150m, 152m Ho derived from decay properties

Atomic masses of147m, 148m, 149m Tb,148Dy,150m, 152m Ho derived from decay properties

New exotic neutron-deficient nuclei nearN=82

Isospin Dependence in the Odd-Even Staggering of Nuclear Binding Energies

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