Soft X-ray appearance potential spectroscopy of C,N, O,and S chemisorbed on some 3d transition metals

The 1s level soft X-ray appearance potential spectra of C, N, O, and S adsorbed on polycrystalline 3d transition metal surfaces (e.g. Ti, Cr, Fe, and Ni) are presented. In the chemisorption regime of adsorption the adsorbate Is level spectra are characterized by a single peak above the excitation threshold. The peak is thought to be related to an enhanced local density of unfilled valence states on the adatoms. The peak widths correlate with the widths of the unfilled portion of substrate d-band in a way consistent with a mixing of the adsorbate valence states and the substrate d-states.     

Zero-correlation linear cryptanalysis of reduced-round LBlock

Zero-correlation linear attack is a new method developed by Bogdanov et al. (ASIACRYPT 2012. LNCS, Springer, Berlin, 2012) for the cryptanalysis of block ciphers. In this paper we adapt the matrix method to find zero-correlation linear approximations. Then we present several zero-correlation linear approximations for 14 rounds of LBlock and describe a cryptanalysis for a reduced 22-round version of LBlock. After biclique attacks on LBlock revealed weaknesses in its key schedule, its designers presented a new version of the cipher with a revised key schedule. The attack presented in this paper does not exploit the structure of the key schedule or S-boxes used in the cipher. As a result, it is applicable to both variants of the LBlock as well as the block ciphers with analogous structures like TWINE. Moreover, we performed simulations on a small variant LBlock and present the first experimental results on the theoretical model of the multidimensional zero-correlation linear cryptanalysis method.     

In-beam study of 102Sn

Excited states in ¹⁰²Sn have been identified for the first time, in an in-beam γ-ray spectroscopic experiment. Two γ-ray transitions with energies 1472 and 497 keV following the decay of the seniority 6⁺ isomer with t_1/2 = 1.0(5) μs were unambiguously assigned to ¹⁰²Sn. Due to the very low cross section of about 2 μb for producing ¹⁰²Sn in the reaction ⁵⁰Cr(⁵⁸Ni,1α2n), a highly selective detector setup utilizing NORDBALL ancillary detectors and a recoil catcher device was used. High γ-ray detection efficiency was achieved with two EUROBALL Ge cluster detectors.     

Search for the Jacobi shape transition in light nuclei

The -rays following the reaction 105 MeV ¹⁸O + ²⁸Si have been measured using the EUROBALL IV, HECTOR and EUCLIDES arrays in order to investigate the predicted Jacobi shape transition. The high-energy -ray spectrum from the GDR decay indicates the presence of large deformations in the hot ⁴⁶Ti nucleus, in agreement with new theoretical calculations based on the rotating liquid-drop model.Received: 29 November 2002, Published online: 9 March 2004PACS: 24.30.Cz Giant Resonances - 21.60.Ev Collective modelsJ.P. Vivien: Deceased     

High-spin states in110Cd

A comparison of the experimental and theoretical K/L conversion-intensity ratios of E0 transitions in the lead region is presented. No major differences were found, the overall agreement being better than 7%. However, with the present data, a systematic 5% deficiency of the measured values, as compared with the calculated ones, can not be ruled out.     

Interaction strength and shape difference for the h9/2 and h11/2 configurations in163Tm

The strongly shape driving πh_9/2[541]l/2^? configuration with α=+1/2 exhibits some anomalous, and so far unexplained, features concerning the crossing frequency, ?ω_c, the aligned angular momentum, i_x, and interaction strength, at the alignment of the first pair of i_13/2 quasineutrons in several odd-Z rare earth-nuclei. The h_9/2[541]1/2^? and h_11/2[523]7/2^? bands have been studied in the stably deformed rare-earth nucleus¹⁶³Tm to investigate these features. A difference in band crossing frequency of ～ 80 keV between the two bands is found. Rotational bands built on these two configurations have been found to cross in the spin range I=25/2–29/2 ?. Theγ-decay pattern between the two bands is established in the crossing region and analysed in terms of a moderate shape difference between them. A theoretical estimate of the size of the interaction strength between the two bands is presented and compared to the experimental value. The observed band structure in¹⁶³Tm is very similar to that of¹⁶⁷Lu which has 2 protons and 2 neutrons in addition. This observation is discussed in relation to the similarity of the yrast bands of the two even-even “core” nuclei¹⁶²Er and¹⁶⁶Yb, for which theγ-transition energies are identical within ～0.2 keV below the vi_13/2 crossing.     

Application of photodiode array detection and fast atom bombardment mass spectrometry for the identification of the arginine residue in neuropeptides.

Chemical derivatization by phenylglyoxal (PGX) was applied to the identification of arginine in the neuropeptides dynorphin A (1-6) and substance P. The obtained products were separated on a short reversed phase C18 column and analysed on-line with the photodiode array UV technique. The selective attachment of a chromogenic molecule into the arginine residue resulted in significant change in the absorbance spectra around 250 nm, depending on the number of PGX molecules attracted. Further analysis employed fast atom bombardment mass spectrometry (FAB MS) and C-terminal sequencing for detailed verification of the derivatives formed during modification with PGX. The results clearly demonstrated that the photodiode array technique, when combined with chemical modification of certain amino acids, provides new possibilities for the analysis of peptide structures.     

High spin states of120Ba

The very neutron deficient nucleus¹²⁰Ba has been investigated in a high-spin γ-spectroscopic study. The yrast band of¹²⁰Ba is extended up to spin 22? and one tentatively assigned negative-parity side band is observed up to spin 15?. The experimental results are compared with Total Routhian Surface calculations.     

Experimental moments of inertia in Pd and Cd isotopes and their interpretation within the extended Nilsson-Strutinsky model

High-spin properties of even Pd and Cd isotopes have been studied by means of a 118 MeV ¹²C beam impinging onto a ¹⁰⁰Mo target. The γ-rays following the reaction were recorded using six NaI(Tl) detectors in a two-dimensional coincidence arrangement. Energy-correlation spectra were extracted from the coincidence matrix and used to obtain information on the collective moment of inertia $\text{I}$. The gross properties of the behaviour of this moment of inertia are discussed within an extended Nilsson-Strutinsky model. The experimentally observed variation of the moment of inertia at high rotational frequencies is tentatively explained as being due to an increase of $\text{I}$ as the band approaches its termination.