Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Absolute energies and emission line shapes of the L x-ray transitions of
  lanthanide metals   We use an array of transition-edge sensors, cryogenic microcalorimeters with
4 eV energy resolution, to measure L x-ray emission-line profiles of four
elements of the lanthanide series: praseodymium, neodymium, terbium, and
holmium. The spectrometer also surveys numerous x-ray standards in order to
establish an absolute-energy calibration traceable to the International System
of Units for the energy range 4 keV to 10 keV. The new results include emission
line profiles for 97 lines, each expressed as a sum of one or more Voigt
functions; improved absolute energy uncertainty on 71 of these lines relative
to existing reference data; a median uncertainty on the peak energy of 0.24 eV,
four to ten times better than the median of prior work; and 6 lines that lack
any measured values in existing reference tables. The 97 lines comprise nearly
all of the most intense L lines from these elements under broad-band x-ray
excitation. The work improves on previous measurements made with a similar
cryogenic spectrometer by the use of sensors with better linearity in the
absorbed energy and a gold x-ray absorbing layer that has a Gaussian
energy-response function. It also employs a novel sample holder that enables
rapid switching between science targets and calibration targets with excellent
gain balancing. Most of the results for peak energy values shown here should be
considered as replacements for the currently tabulated standard reference
values, while the line shapes given here represent a significant expansion of
the scope of available reference data.

8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
19
The categories of this paper are: eess
28
The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph
25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
26
The categories of this paper are: bayes-an