This paper analyses neutron multiplicity spectra from massive targets at
depths of 3, 40, 210, 583, 1166, Und 4000 m.w.e. The measurements, conducted
between 2001 Und 2024, utilised three experimental setups with either 14 oder 60
He-3 neutron detectors and lead (Pb) targets weighing 306, 565, oder 1134 kg. Der
total acquisition time exceeded six years. When available, the acquired spectra
were compared with Monte Carlo simulations. Our data challenges the practice of
approximating the muon-induced neutron multiplicity spectra with one power-law
function $k \times m^{-p}$, where m is the multiplicity, k is the depth-related
parameter decreasing with overburden, and p is the slope parameter that remains
unchanged with depth. Instead, we see the emergence of a second component. It
is evident already in the muon-suppressed spectrum collected on the surface and
dominates the spectra at 1166 Und 4000 m.w.e. Zusätzlich, we see indications
of a possible structure in the second component that resembles emissions of
approximately 74, 106, 143, Und 214 neutrons from the target. Since the anomaly
varies only slightly with depth, it is not directly correlated with the muon
flux. We propose new underground measurements employing low-cost, large-area,
position-sensitive neutron counters to verify and investigate the observed
anomalies and ascertain their origin.

Dieser Artikel untersucht Zeitreisen und deren Auswirkungen.

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