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We investigated cluster radioactivity and alpha decay of some superheavy nuclei with atomic numbers Z = 119, 120, which may be produced in the future. Two models are used to calculate the halflives against cluster radioactivity: ASAF (Analytical Super-Asymmetric Fission) and UNIV (Universal Formula). For α decay half-lives we are based on four models: ASAF, UNIV, semFIS (semi-empirical formula based on Fission Theory) and AKRA (first author Akrawy). The Q-values are calculated using the theoretical model of atomic masses WS10, which sometimes is called W4. [ABSTRACT FROM AUTHOR]

The probable cluster decay modes in platinum isotopes are predicted with the help of effective liquid drop model. The calculated half-lives are compared with those of universal decay law model and with the experimental data. The investigation affirms the decisive role of neutron magicity in the phenomenon of cluster radioactivity. It is found that the probability of cluster emission decreases with the increase in the neutron number of parent nucleus. Geiger-Nuttall plots of the probable decay modes show linear behaviour, which in turn leads to the equation for logarithmic half-life for the clusters emitted from Pt isotopes. [ABSTRACT FROM AUTHOR]

Using the Coulomb and proximity potential model (CPPM) with the nuclear surface tension improved by Reisdorf, the various fragmentations in the cold fission of Cm are studied as a cluster decay process within a fission model. The computed half-life values are compared with the values reported by Sandulescu et al. using the double-folding M3Y nuclear-nuclear potential model and are in agreement with CPPM values. The diffuseness width used in the proximity potential is found to be sensitive to the half-life. The inner penetrability is computed based on the formalism of Poenaru et al. (J. Phys. G: Nucl. Part. Phys. 17, 443 (1991)) and found that in the cold fission the contribution of the inner part (overlap region) of the barrier is significant compared to cluster decays. The variation of the inner penetrability with fragment mass is studied which emphasizes the fact that cold fission is an extension of cluster decay. [ABSTRACT FROM AUTHOR]

A fast-timing setup has been developed to measure the nuclear-state half-lives of neutron-rich nuclei. The first on-line measurements were performed on Cs obtained from the β decay of Xe. These neutron-rich Xe nuclei were produced by the U photofission induced by the 50MeV electron beam delivered by the ALTO facility. The half-lives of the first excited state in Cs and of six excited states in Cs were measured for the first time. Taking into account new information given by the deduced transition probabilities, we discuss the structure of the first excited states in Cs : it is shown that, in both nuclei, the first excited $$\tfrac{5} {2}^ +$$ level corresponds mainly to the one-proton state issued from the π2 d orbital and that the most probable spin values for the states located at 289.8, 393.5, and 393.8keV in Cs are $$\tfrac{5} {2}^ +$$, $$\tfrac{3} {2}^ +$$, and $$\tfrac{1} {2}^ +$$, respectively. [ABSTRACT FROM AUTHOR]

fast-timing method to determine lifetimes of nuclear states in the sub-nanosecond domain is presented. It is based on in-beam measurements of triple-gamma coincidences in heavy-ion fusion-evaporation reactions, performed with an array of HPGe and LaBr:Ce detectors. The high-energy resolution HPGe detectors are used to define de-exciting cascades, while the fast LaBr:Ce detectors are used to determine the decay time spectra of selected levels fed by these cascades. A special method to treat the time information of an array of fast detectors is employed in order to fully use the efficiency of the array. Two measurements are presented to illustrate the method: a re-determination of the known half-life $\ensuremath T_{1/2}=0.7$ ns of the $\ensuremath E_x=205$ keV, $\ensuremath J^{\pi}=7/2^+$ level in Cd (test experiment), and the determination of a half-life $\ensuremath T_{1/2}=47$ ps for the $\ensuremath E_x=367$ keV, $\ensuremath J^{\pi}=3/2^+$ state of Tl . [ABSTRACT FROM AUTHOR]

The new neutron-deficient isotope Th was produced in the complete-fusion reaction Ni + Sm $ \rightarrow$Th + 3n . Evaporation residues were separated in-flight by the velocity filter SHIP and subsequently identified on the basis of energy-, position- and time-correlated $ \alpha$ -decay chains. The measured $ \alpha$ -decay energy and half-life value of Th are 8044(30)keV and 1.7 ms, respectively. Improved data on the $ \alpha$ -decay of Th , Th , Th and Ra were obtained using complete-fusion reactions of Ni with Sm , Sm , and Sm targets. [ABSTRACT FROM AUTHOR]

Low-energy isomeric states of 86Y were populated in the reaction 73Ge + 16O at 57MeV and were investigated by means of delayed n $ \gamma$ and $ \gamma$ $ \gamma$ coincidences. A half-life of 70(7)ns was measured for the 5- state at 208keV, yielding an exceptionally small B( M1) value of 2.0(7)×10-5 W.u. and a B( E2) value of 0.34(+24 -13) W.u. For the other three known isomeric states at 218, 243, and 302keV, the half-lives extracted from the present experimental data are in very good agreement with previous measurements. Given the newly observed isomeric character of the 5- 208keV state, the re-analysis of earlier experimental data on the 302keV isomer led to a new spin-parity assignment, 6+, for this state. In addition, this re-evaluation provided two g -factors, -0.083(3) and +0.63(2) , for the 208 and 302keV states, respectively. The results are discussed in terms of spherical-shell model calculations performed with a truncated space of configurations built on the f5/2 , p3/2 , p1/2 , and g9/2 valence orbitals. Effective spin, orbital, and “tensor” g -factors were determined empirically for protons and neutrons in the considered configuration space. [ABSTRACT FROM AUTHOR]

The isotope 261Bh was produced in the reaction 209Bi(54Cr, 2n)261Bh and its $ \alpha$ decay has been remeasured. It was found that it populates by an unhindered transition of $ \approx$ 10 MeV an excited level at E * > 350 keV in the daughter nucleus 257Db . The latter decays by internal transitions either into the isomeric state or the ground state. A somewhat improved half-life value of T1/2 = 11.8+3.9 -2.4 ms was obtained for 261Bh . The data support the previous assignment of the $ \alpha$ activities 257Db (1) and 257Db (2) to the isomer and to the ground state, respectively. No evidence for an isomeric state in 261Bh decaying by $ \alpha$ emission was found. Based on the experimental results and theoretical calculations a partial decay scheme of 261Bh including spin and parity assignments of the ground-state and excited levels in the daughter nucleus 257Db populated by the $ \alpha$ decay and succeeding internal transitions have been suggested. 261Bh represents so far the heaviest nucleus for which such an attempt has been made. No spontaneous fission (SF) events that could be attributed to 261Bh were observed, resulting in an SF branching bSF < 0.05 . The measured production cross-section is (64±15) pb at E * = 22 MeV. [ABSTRACT FROM AUTHOR]

The predictabilities of the three $ \alpha$ -decay half-life formulae, the Royer GLDM, the Viola-Seaborg and the Sobiczewski-Parkhomenko formulae, have been evaluated by developing a method based on the ansatz of standard experimental benchmarking. The coefficients of each formula were re-derived using the reliable data of the $ \alpha$ -standards nuclei. The modified formulae that resulted were used to evaluate the accuracies of the formulae towards the prediction of half-lives of a set of nuclides with well-studied $ \alpha$ spectroscopic data as well as a set of exotic $ \alpha$ emitters. Further, a simple linear optimisation of the modified formulae allowed adjustments for the insufficient statistics of the primary data set without changing the modified formulae. While the three modified formulae showed equivalent results for all the medium heavy nuclei except the odd-odd, the modified GLDM showed relatively the best figures of merit for the odd-odd and superheavy nuclides. [ABSTRACT FROM AUTHOR]

The search for double-β processes in 108Cd and 114Cd was realized by using data of the low-background experiment with the CdWO4 crystal scintillator at the Gran Sasso National Laboratories of the INFN. New improved half-life limits on double-beta processes were established, in particular T 1/2 0ν2ɛ( ^108Cd ) ≥ 1.0(2.7)×1018 yr, T 1/2 2ν2β( ^114Cd ) ≥ 1.3(2.1)×1018 yr, and T 1/2 0ν2β( ^114Cd ) ≥ 1.1(2.5)×1021 yr at 90(68)% C.L. [ABSTRACT FROM AUTHOR]

Half-life measurements for both ground-state and isomeric transitions in proton radioactivity are systematized by using a semiempirical, one-parameter model based on tunneling through a potential barrier, where the centrifugal and overlapping effects are taken into account within the spherical nucleus approximation. This approach, which has been successfully applied to alpha decay cases covering ∼ 30 orders of magnitude in half-life, has shown, in addition, very adequate at fitting all existing data on partial half-life, T 1/2p , of proton emission from nuclei. Nearly 70 measured half-life values have been analysed, and the data could be described by two straight lines relating the pure Coulomb contribution to half-life with the quantity $\ensuremath Z_{\rm d}(\mu_0/Q_{{\rm p}})^{1/2}$ ( Z d is the atomic number of the daughter nucleus, μ0 is the reduced mass, and Q p is the total nuclear energy available for decay). These straight lines are shown to correspond to different degrees of deformation, namely, very prolate ( δ ≳ 0.1 , and other shaped ( δ ≲ 0.1 parent nuclei. The goodness in reproducing the data attained in the present systematics allows for half-life predictions for a few possible cases of proton radioactivity not yet experimentally accessed. [ABSTRACT FROM AUTHOR]

A K isomer with a half-life of (110±10) ms at an excitation energy of 1254keV has been identified in the nucleus 252No . The isomer is interpreted as a two-quasineutron state with K π = 8- . The isotope 252No was produced in the fusion-evaporation reaction 206Pb(48Ca, 2n)252No . The experiment has been performed at the velocity filter SHIP of GSI Darmstadt. [ABSTRACT FROM AUTHOR]

α-decay half-lives for 104, 105, 106Te and 108, 109, 110Xe close above the doubly-magic 100Sn are calculated from systematic double-folding potentials. The derived α preformation factors are compared to results for 212, 213, 214Po and 216, 217, 218Rn above the doubly-magic 208Pb. α-decay energies of Q α = 5.42±0.07MeV and 4.65±0.15MeV are predicted for 104Te and 108Xe; the corresponding half-lives are T 1/2 ≈ 5ns for 104Te and of the order of 60μs for 108Xe. Additionally, the properties of rotational bands in 104Te are analyzed, and the first excited 2+ state in 104Te is predicted at E x = 650±40keV; it decays preferentially by γ emission with a reduced transition strength of 10 Weisskopf units to the ground state of 104Te and with a minor branch by α emission to the ground state of 100Sn. [ABSTRACT FROM AUTHOR]

The odd- Z isotope 255Lr, its daughter 251Md and grand-daughter 247Es were studied in two experiments performed at GANIL and the University of Jyväskylä. The 255Lr nuclei were produced using the cold fusion-evaporation reaction 209Bi(48Ca, 2n)255Lr at a bombarding energy of 217MeV. The single-particle structure and decay properties were investigated using α, γ and electron spectroscopy. The ground-state spin and parity could be assigned for 255Lr (1/2-) and 251Md (7/2-). States corresponding to the 7/2+[633], 7/2-[514] and 1/2-[521] Nilsson orbitals were observed. Results are compared to experimental data obtained in neighbouring isotopes and to Hartree-Fock-Bogoliubov calculations using the Skyrme interaction SLy4 and a density-dependent pairing interaction. The position of the 1/2-[521] orbital from the spherical 2 f 5/2 shell is discussed. [ABSTRACT FROM AUTHOR]

The β decay of 94Pd and of the 71s isomer of 94Rh was investigated by using total γ-ray absorption techniques. Several levels in 94Rh are established, including a new low-lying isomer characterized by a half-life of 0.48(3)μs and a de-exciting transition of 55keV. E2 multipolarity is determined for this transition by measuring the intensities of its γ-rays and the characteristic X-rays from its electron conversion. On the basis of the measured reduced β-decay transition rates to known 94Ru levels and shell model considerations, the spin-parity of the 71s and the 0.48μs isomers of 94Rh is assigned to be (4+) and (2+), respectively. The β-decay strength distributions measured for 94Pd and the 71s isomer of 94Rh yield Q EC values of 6700(320) and 9750(320)keV for these decays and give evidence for the population of those states below and above the magic N = 50 gap that belong to both components of the 0 g spin-orbit doublet. [ABSTRACT FROM AUTHOR]

7Be decays via electron capture and therefore its half-life is expected to depend on the electron density at the nucleus. We measured the 7Be half-life in palladium, tungsten, zirconium and tantalum metals, in order to investigate the influence of the quasi-free electrons in metals on the probability of electron capture. The 7Be samples were obtained implanting a 4.85MeV pure radioactive 7Be ion beam. The 7Be half-life was determined measuring the 478keV gamma decay following the electron capture by means of HPGe detectors. In order to reduce systematic errors, we planned to perform independent measurements in three different laboratories: Naples (Italy), Bochum (Germany) and Debrecen (Hungary). On the basis of the first results, we do not find a 7Be half-life change within the experimental errors of 0.4%. [ABSTRACT FROM AUTHOR]

The Canadian Penning trap (CPT) mass spectrometer at the Argonne National Laboratory makes precise mass measurements of nuclides with short half-lives. Since the previous ENAM conference, many significant modifications to the apparatus were implemented to improve both the precision and efficiency of measurement, and now more than 60 radioactive isotopes have been measured with half-lives as short as one second and with a precision ( Δ m/ m) approaching 10-8. The CPT mass measurement program has concentrated so far on nuclides of importance to astrophysics. In particular, measurements have been obtained of isotopes along the rp-process path, in which energy is released from a series of rapid proton-capture reactions. An X-ray burst is one possible site for the rp-process mechanism which involves the accretion of hydrogen and helium from one star onto the surface of its neutron star binary companion. Mass measurements are required as key inputs to network calculations used to describe the rp-process in terms of the abundances of the nuclides produced, the light-curve profile of the X-ray bursts, and the energy produced. This paper will present the precise mass measurements made along the rp-process path with particular emphasis on the “waiting-point” nuclides 68Se and 64Ge. [ABSTRACT FROM AUTHOR]

In an experiment performed at the Accelerator Laboratory of the University of Jyväskylä, the ß-decay half-life of62Ga has been studied with high precision using the IGISOL technique. A half-life ofT1/2 = 116.09(17) ms was measured. Using ß-? coincidences, the ? intensity of the 954 keV transition and an upper limit of the ß-decay feeding of the 0+2 state have been extracted. The present experimental results are compared to previous measurements and their impact on our understanding of the weak interaction is discussed. [ABSTRACT FROM AUTHOR]

The a-decay fine structure of210-214Fr has been studied by a-?-coincidence measurements. The nuclei were produced using the12C on209Bi reaction. Evaporation residues recoiling out of the target were separated in-flight by the velocity filter SHIP and stopped in a position-sensitive 16-strip PIPS-detector in order to study their subsequent decays. In the present work new and improved results for210-214Fr, produced by a-decay of the primary reaction products214-218Ac, were extracted. The results are discussed and compared to previously published data. [ABSTRACT FROM AUTHOR]

The a-decays of110Xe and106Te were studied at the GSI on-line mass separator. By using the grow-in and decay of the a activity, observed in pulsed-beam measurement, the half-life of110Xe was found to beT1/2 = 105+35-25ms. The lifetime of106Te was determined to beT1/2 = 70+20-10µs by measuring the time between two successive110Xe ?{106} Te ?{102} Sn a-decays. The newly determined half-lives were used to calculate reduced a-decay widths for106Te and110Xe. Universal systematics of reduced a widths are proposed to search for the evidence of enhancement of the a formation amplitude in the emitters above100Sn. [ABSTRACT FROM AUTHOR]

The lifetimes of the 615 and 619 keV levels in181Ta have been remeasured by using a-delayed coincidence set up with fast plastic (Pilot U) and BaF2 detectors. The presently measured values for both levels have been found to be in strong disagreement with results reported earlier. For the 615 keV level, the half-life has been found to bens in striking contrast to the earlier reported value of 17.6s. The half-life of the 619 keV level has been found to beps, whereas values of 0.87 ns and 2.4 ns were reported previously. The nanosecond half-life of the 615 keV level has been confirmed from a separate measurement by employing a NaI(Tl)-Pilot U detector combination. The importance of lifetime measurements for the 615 keV level in perturbed angular correlation studies is discussed. [ABSTRACT FROM AUTHOR]

Challenged by recent theoretical work, a study of the β+EC decay of the N = Z even-even nucleus 76Sr has been undertaken in order to assign the parent ground-state deformation. In this study 13 levels with Jπ = 1++ have been located in 76Rb. The beta-delayed proton emission has been observed for the first time in an N = Z even-even nucleus. The βp branching ratio has been determined to be (3.4 ± 0.8) 10-5. The 76Sr half-life has been remeasured and a more precise value of 7.89 ± 0.07 s has been obtained. On the basis of the comparison of measured Gamow-Teller strength with calculated strength distributions for both oblate and prolate deformation, it is concluded that the 76Sr has strong prolate deformation in the ground state. [ABSTRACT FROM AUTHOR]

The double-beta decay matrix elements and half-lives for 106Cd are computed with the second quasi random phase approximation (SQRPA) method and using two single-particle (s.p.) bases. For the neutrino-emitting decay modes the two-positron emission (β+β+), the positron emission/electron capture (β+/EC) and the double electron capture (EC/EC) processes are treated. It was found that the nuclear matrix elements (NME) display a strong dependence on the strength of the particle-particle interaction and an important contribution to the decay amplitude is coming from the 1+ ground state of the intermediate nucleus 106Ag. Their values depend weakly on the s.p. basis used. For both bases the deviations from the Ikeda sum rule are only within 2–3%. We got half-lives for the β+/EC of the order of ∼ 1021 y which is not far from the actual experimental limits. For the neutrinoless β+β+ and β+/EC decay modes the NME relevant both for the mass mechanism and the right-handed (RH) currents were calculated. They are found to be slightly larger than those obtained in our previous calculations (M. Hirsch, K. Muto, T. Oda, H.V. Klapdor-Kleingrothaus, Z. Phys. A 334, 151 (1994)). Using the value of the neutrino mass parameter extracted from the recently reported first experimental evidence of the neutrinoless decay mode (i.e. 0.39 eV) (H.V. Klapdor-Kleingrothaus, A. Dietz, H.I. Harney, I.V. Krivosheina, hep-ph/0201231; Mod. Phys. Lett. A 16, 2409 (2001); H.V. Klapdor-Kleingrothaus, A. Dietz, I.V. Krivosheina, Part. Nucl. Lett. 110, 57 (2002); Found. Phys. 32, 1181 (2002)), we got half-lives of ∼ 1028 y and 1027 y, for the 0vβ+β+ and 0vβ+/EC processes, respectively. An experimental investigation of these decays could be useful for testing the importance of the right-handed current mechanism to the occurrence of neutrinoless ββ decay. [ABSTRACT FROM AUTHOR]

For the β--decay of 198Au in a Au metallic environment the half-life was observed to be longer by 0.4±0.7% at room temperature ( T = 293K) and by 4.0±0.7% when the metal was cooled to T = 12K, both compared to the literature value of T 1/2 = 2.6943±0.0008d. [ABSTRACT FROM AUTHOR]

For the β--decay of 198Au in a Au metallic environment the half-life was observed to be longer by 0.4±0.7% at room temperature ( T = 293K) and by 4.0±0.7% when the metal was cooled to T = 12K, both compared to the literature value of T 1/2 = 2.6943±0.0008d. [ABSTRACT FROM AUTHOR]

For the electron capture of 7Be in the metallic environments Pd and In the 7Be half-life was observed to increase by 0.9±0.2 and 0.7±0.2%, respectively, while in the insulator Li2O it was unchanged within experimental error (all samples cooled to T = 12K). The observations are consistent with the predictions of the Debye plasma model applied to the quasi-free electrons in the metals. [ABSTRACT FROM AUTHOR]

We report preliminary results on the observation of the isomeric 0+2 state in 44S. This state, populated in the fragmentation of a 48Ca beam, is located at 1365±1 keV and has a half-life of 2.3±0.3 μs. The observation of this isomer is the first experimental evidence of shape coexistence in 44S which was predicted by various theoretical approaches. In particular, we found a good agreement with shell model calculations. [ABSTRACT FROM AUTHOR]

The evolution of the π h11/2ν h11/2 and π h11/2ν s1/2 isomeric configurations was studied for the N = 77 isotones near the proton drip line. The decays of metastable levels in 140Eu, 142Tb , and 144Ho were measured by means of X-, gamma- and conversion electron spectroscopy at the Recoil Mass Spectrometer at Oak Ridge. The sequence of isomeric levels in 140Eu was experimentally determined. The half-life of the π h11/2ν h11/2 state in 142Tb was remeasured to be 25(1) μs. The spins and parities of 5- and 8+ for the π h11/2ν s1/2 and π h11/2ν h11/2142Tb isomers, respectively, were established from measured multipolarities. No evidence for the expected 1+ ground state was found in the 144Ho decay data. [ABSTRACT FROM AUTHOR]

The very neutron-deficient isotope 50Ni was produced in fragmentation reactions between a 650 A MeV 58Ni beam and a 9Be target. For the first time the decay of this nucleus was investigated, leading to the determination of the half-life as 12+3 -2 ms and the branching ratio for β-delayed proton emission of (70 ± 20)%. [ABSTRACT FROM AUTHOR]

An empirical formula for the half-life estimates for the one proton transition from ground state and isomeric states of 44 proton emitters is presented. The experimental data of the logarithm of the half-life corresponding to different ℓ-values, viz., ℓ=0 (8-emitters), ℓ=2 (14-emitters), and ℓ=5 (19-emitters), of different proton emitters are separately fitted as a function of the charge number of the daughter and Q -value. The slopes and the intercept values from the obtained relations are found to vary linearly with the ℓ-values for the choices of a particular power value of 0.8 on the Z1 dependence. A linear relation of the slopes and intercepts is obtained as a function of ℓ, thus resulting in a simple formula involving only four parameters applicable to different ℓ-values. The proton emitters with ℓ=3 (3-emitters) are not considered for the fitting. The obtained four parameter formula is applied to estimate the half-lives of the proton emitters with ℓ = 3. The predictions of the formula are found to be in good agreement with the experimental data for the proton emitters with ℓ=3. Our calculated values are compared with the available theoretical as well as empirical estimates of the experimentally known proton emitters. Further, the redictions for most possible proton emissions reported earlier are also compared with our calculations using the proposed formula. Because of the good overall agreement with the experimental data as well as with other theoretical/model predictions, this proposed formula may serve as a handy tool for planning new experiments. [ABSTRACT FROM AUTHOR]

The β-delayed particle emission from 21Mg was studied at the Radioactive Ion Beam Line in Lanzhou (RIBLL1). Silicon array and high-purity germanium (HPGe) detectors were used to detect the charged particles and γ-rays emitted from the decay. Half-life time of 21Mg was determined to be 121.9(6) ms. New levels (5.639(26) MeV and 6.644(34) MeV) in the nucleus 21Na were observed. An improved proton spectrum coincident with γ-rays at 1.633 MeV was obtained. A new partial decay scheme was constructed based on the present measurement. [ABSTRACT FROM AUTHOR]

Using the Coulomb and proximity potential model for deformed nuclei (CPPMDN) the half-lives of proton emissions have been predicted for even and odd Z nuclei in the heavy and superheavy region with Z = 100-136. The half-lives are also evaluated using the Coulomb and proximity potential model (CPPM) of Santhosh et al., in which both the parent and daughter nuclei are treated as spherical. The Geiger-Nuttall law (G-N) is studied for all cases of proton radioactivity under study. From the observed variation of G-N plots with respect to the Z value of the proton emitter, we obtained a new relation for proton decay half-lives. Using this relation the half-life is evaluated for the experimentally detected 44 proton emitters and is found to agree with the experimental data with a standard deviation of 0.8083s. Also, the half-lives are recalculated for all proton emitters in the heavy and superheavy region using the relation we obtained and we found that the half-lives evaluated using CPPMDN are closer to those obtained using the new relation than CPPM. Through the predictions of decay half-lives of the proton emitters in the heavy and superheavy region, the present phenomenological approach can be used satisfactorily to study alpha decay, cluster radioactivity and proton radioactivity. [ABSTRACT FROM AUTHOR]

Partial half-life of the radioactive decay by the two-proton emission mode has been estimated for proton-rich nuclei of mass number 18 by a model based on the quantum mechanical tunneling mechanism through a potential barrier. The Coulomb, centrifugal and overlapping contributions to the barrier have been considered within the spherical nucleus approximation. The present calculation method has been shown to be adequate in reproducing the existing experimental half-life data for 19Mg, 45Fe, 48Ni, and 54Zn 2p-emitter nuclides within a factor six. For 67Kr parent nucleus the calculated partial 2p-decay half-life has been found to be ten times greater than the recent, unique measured value at RIKEN Nishina Center. Prediction for new, yet unmeasured cases of two-proton radioactivity are also reported. [ABSTRACT FROM AUTHOR]

For the β+-decay of 22Na in the metallic environment Pd cooled to T = 12 K the 22Na half-life was observed to be shorter by 1.2±0.2%. The result is consistent with --but lower than-- the prediction of the Debye plasma model. [ABSTRACT FROM AUTHOR]

A correction to the article "Precise half-life measurement of the 26Si ground state" that was published in a previous issue is presented.