Large-scale calcium metal sample preparation for 41Ca isotope enrichment

Henning, W.; Liu, Z.; Lucas, H.F.; Thomas, George E.; Adair, H.L.; Grisham, W.B.

doi:10.1016/0168-9002(87)91178-8

Cited by 6 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…From the observed activity of (26 ± 4) µBq we can readily calculate that there are (1.4 ± 0.2) × 10 8 41 Ca atoms present in the crystal, only a fraction of (2.2 ± 0.3) × 10 −16 of all calcium atoms. This is an order of magnitude more accurate than other measurements of this fraction which are typically carried out by accelerator mass spectrometry (AMS) [9,10,11]. Our present sensitivity is in the 10 −17 range even with CaWO 4 crystals that are not optimized for this purpose.…”

Section: Activated Calciummentioning

confidence: 74%

Electron and gamma background in CRESST detectors

Lang

Angloher

Bauer

et al. 2010

Astroparticle Physics

View full text Add to dashboard Cite

The CRESST experiment monitors 300 g CaWO 4 crystals as targets for particle interactions in an ultra low background environment. In this paper, we analyze the background spectra that are recorded by three detectors over many weeks of data taking. Understanding these spectra is mandatory if one wants to further reduce the background level, and allows us to cross-check the calibration of the detectors. We identify a variety of sources, such as intrinsic contaminations due to primordial radioisotopes and cosmogenic activation of the target material. In particular, we detect a 3.6 keV X-ray line from the decay of 41 Ca with an activity of (26 ± 4) µBq, corresponding to a ratio 41 Ca/ 40 Ca = (2.2 ± 0.3) × 10 −16 .

show abstract

Section: Activated Calciummentioning

confidence: 74%

Electron and gamma background in CRESST detectors

Lang

Angloher

Bauer

et al. 2010

Astroparticle Physics

View full text Add to dashboard Cite

show abstract

“…Lithium (Li) and Calcium (Ca) are the most sensitive elements in the list of prepared targets. Several investigators have already reported the fabrication of Ca and Li targets [6][7][8][9][10][11][12][13][14][15]. Development of targets of other oxidizing elements such as Lead (Pb) and Barium (Ba) have also been reported by several investigators [16][17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 93%

Fabrication and characterization of targets of oxidizing materials for heavy ion nuclear reaction experiments

et al. 2019

View full text Add to dashboard Cite

Fabrication of targets of materials which get readily oxidized poses lot of challenges in heavy ion nuclear reaction experiments. Targets of oxidizing elements, viz. Li, Ca, Pb, Nd, Gd, Sm, Ba, Ce, Pr, Bi, Er and Eu have been frequently fabricated in target development laboratory at Inter-University Accelerator Centre (IUAC) in the form of free standing films and foils with backing support. In some cases, foils of these elements are sandwiched between two protective foils to avoid oxidation while exposed to air. Role of sandwiching (encapsulation) in minimizing the oxidation of target surface and its effect in preservation of expensive isotopic targets for longer duration is reported in the present investigations. The level of contamination from parting agents in sandwiched targets is also reported in this paper. K: Accelerator Applications; Manufacturing; Overall mechanics design (support structures and materials, vibration analysis etc); Targets (spallation source targets, radioisotope production, neutrino and muon sources) 1Corresponding author.

show abstract