In-beam internal conversion electron spectroscopy with the SPICE detector

Abstract

The SPectrometer for Internal Conversion Electrons (SPICE) has been commissioned for use in conjunction with the TIGRESS γray spectrometer at TRIUMF's ISAC-II facility. SPICE features a permanent rare-earth magnetic lens to collect and direct internal conversion electrons emitted from nuclear reactions to a thick, highly segmented, lithium-drifted silicon detector. This arrangement, combined with TIGRESS, enables in-beam γ-ray and internal conversion electron spectroscopy to be performed with stable and radioactive ion beams. Technical aspects of the device, capabilities, and initial performance are presented.

Improved measurement of the 02+→01+E0 transition strength for Smallcombe1, Garnsworthy2, Körten3 et al. 2022Phys. Rev. CSelf Cite5000View full textAdd to dashboardCite

“…This agrees with the previous measurement [29] of τ = 27.8 (6) ns. However, the value of τ = 22.8 (14) ns reported in Ref. [30] is significantly discrepant and so the normalized residual method (NRM) was used to determine a weighted average [31,32].…”

“…The Spectrometer for Internal Conversion Electrons (SPICE) [14,[20][21][22] was used to detect internal conversion electrons. SPICE utilizes a 6.1-mm-thick lithium-drifted silicon [Si(Li)] detector located upstream from the reaction target, and shielded from direct sight by a photon shield.…”

“…FIG.3. Efficiency curve of the SPICE detector (red line) determined from GEANT4 simulations[14], scaled to in-beam E 2 and M1 data (green circles), E 0 data (pink squares), and offline 207 Bi data (black triangles). See text for details.…”

Improved FIFRELIN de-excitation model for neutrino applications

“…The IC process is now treated more accurately, allowing for the emission of an X ray after an emission of a conversion electron. The improved modeling of the IC and IPC processes can be suitable in various experimental applications that rely on electron spectroscopy [28][29][30].…”