Mini-orange spectrometers for in- and off-beam observation of conversion electrons

Nuclear structure of 231Ac

“…If only one or two of the partial conversion coefficients are extracted from the data and they are sufficient to determine the multipolarity (Xλ) of the transition, we deduce α T (exp)= α i (exp)α The conversion coefficient for the doublet at 205 keV has been obtained in the following way. As previously explained we obtained an α K value of 1.77 (24) for the 204.79 keV transition from γ-γ-coincidences corresponding to an M1 multipolarity. This value almost exhausts the full electron peak observed for the K component.…”

“…The electron spectrometer incorporated a mini-orange filter [23,24] and a 2 mm thick Si(Li) detector with an active area of 300 mm 2 and 1.9 keV energy resolution at ∼100 keV. The detector was cooled to liquid nitrogen temperature by means of a copper cold finger.…”

Mini-orange spectrometer at CIAE

“…A new type of spectrometer for conversion electron consisting of a Si detector and a filter of permanent magnets around a central absorber of lead or tungsten has been created by Klinken J V et al in 1972 [1]. This new type of Mini-Orange spectrometer (MOS) [1][2][3][4] meet the requirements for in-beam measuring conversion electrons due to its advantages of wide energy range, high transmission efficiency, high energy resolution, and easy operation. The MOS has been constructed for a long time and used to measure conversion electrons [5][6][7][8][9][10][11].…”

Structures ofPo201andRn205from EC/Deo1, Podolyák2, Walker3 et al. 2010Phys. Rev. C10090View full textAdd to dashboardCite

“…These products were collected on a magnetic tape and transported to a measurement station at regular time intervals of 16.8 s. At the measurement station, the source could be viewed by an electron spectrometer and two high-purity germanium (HPGe) detectors. The electron detection system incorporated a MINI-ORANGE spectrometer [6,7] and a 4 mm thick Si(Li) detector with an active area of 300 mm 2 and resolution of 2.0 keV at ∼500 keV. The detector was cooled to liquid nitrogen temperature with the help of a copper cold finger.…”