[en] In November 2010 the IAEA Department of Safeguards launched its Long Term Strategic Plan at the IAEA Symposium on International Safeguards: 'Preparing for Future Verification Challenges'. A key element of the Long Term Strategic Plan is the further evolution of the State-level approach for safeguards implementation away from criteria driven safeguards approaches focussed at the facility level, to a safeguards system that is objectives-based and fully information-driven. The State-level approach is a holistic approach to safeguards implementation, applicable to all States, incorporating comprehensive State evaluations and safeguards implementation approaches that make use of all information available to the IAEA. In further evolving the State-level concept State-specific factors and acquisition path analysis will become increasingly important in State evaluations and in the determination of safeguards approaches for each State. It will be important to determine objective modalities for incorporating these factors. Consideration of State-specific factors in determining safeguards approaches is not new - in fact, paragraph 81 of INFCIRC/153 (concluded June 1972) enumerates several such factors that can be considered. This paper will explore some ideas for State-specific factors that could be used in State-evaluations, and how these factors could be used for determining State-by-State safeguards approaches. Ideas for State-specific factors will include effectiveness of State Systems of Accountancy and Control (SSAC), transparency of States in their dealings with the IAEA, and characteristics of a nuclear fuel cycle of a State.

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[en] The transient-field technique has been used to measure, with considerably improved precision, the g factors of the 3/2⁺ and 5/2⁺ states in ¹²⁵Te at 444 and 463 keV, respectively, relative to the g factor of the first excited state in ¹²⁶Te. Together with shell model and weak-coupling core-excitation model calculations, the g-factor measurements provide insight into the orbital occupation of the odd neutron for the low-excitation states in ¹²⁵Te. A new 9/2⁺ level at 1029 keV, together with a firm 7/2⁺ spin assignment for the level at 1018 keV, identifies candidate states for the coupling of the s_1/2 neutron to the 4⁺ core excitation.

[en] The transient-field technique has been used in both conventional kinematics and inverse kinematics to measure the g factors of the 2₁⁺ states in the stable even isotopes of Ru, Pd, and Cd. The statistical precision of the g(2₁⁺) values has been significantly improved, allowing a critical comparison with the tidal-wave version of the cranking model recently proposed for transitional nuclei in this region.

[en] The g factors of the 2₁⁺ states in ⁵⁴Fe and ⁵⁸Fe have been measured relative to the 2₁⁺ state g factor of ⁵⁶Fe using the transient-field technique in inverse kinematics. The results are in satisfactory agreement with recent shell model calculations in the fp model space. For ⁵⁶Fe and ⁵⁸Fe the g factors approach Z/A and are therefore also consistent with collective interpretations of these 2⁺ states

[en] The transient-field technique has been used to measure the g factor of the 2₁⁺ state in ⁵⁶Fe relative to the independently determined g factor of the first 5/2^- state in ⁵⁷Fe. The new result for ⁵⁶Fe agrees with previous measurements but is more precise. Implications for calibrating the transient field and g-factor measurements in the fp region are discussed

[en] Precise measurements of lifetimes in the picosecond range of excited states in the stable even-A Sn isotopes ^{112,114,116,122}Sn have been performed using the Doppler shift attenuation technique. For the first excited 2⁺ states in ¹¹²Sn, ¹¹⁴Sn and ¹¹⁶Sn the E2 transition strengths deduced from the measured lifetimes are in disagreement with the previously adopted values. They indicate a shallow minimum at N = 66 in contrast to the maximum at mid-shell predicted by modern shell model calculations.

[en] Precise measurements of the lifetimes of the first excited 2⁺ states in the stable even-A Sn isotopes ^112-124Sn have been performed using the Doppler shift attenuation technique. For the isotopes ¹¹²Sn, ¹¹⁴Sn and ¹¹⁶Sn the E2 transition strengths deduced from the measured lifetimes are in disagreement with the previously reported values and indicate a shallow minimum at N=66. The observed deviation from a maximum at mid-shell is attributed to the obstructive effect of the s_1/2 neutron orbital in generating collectivity when near the Fermi level.